Recent weather observations from Maidenhead

January 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR JANUARY 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 1 30 02 41 09  4.9 98 10.2  4.8  0.0  5.1  5.1  5.3  5.3  5.2  6.6 10 0  0.3  3.6 000001 1026.0  0.3  0.0  0.2
02 8 19 02 02 97  6.5 90 10.8  4.9  0.4  5.6  5.3  5.6  5.5  5.5  6.6 10 0  0.5  0.0 000000 1027.0  1.2  0.0  0.6
03 8 19 02 02 96 10.6 95 10.9  6.5  6.4  7.3  7.3  7.1  6.3  5.9  6.8 10 0  7.9  0.0 000000 1019.5  8.5  0.0  0.2
04 8 00 00 10 94  4.8 97  8.7  3.1  0.2  5.6  5.4  6.2  6.5  6.3  6.9 10 0  0.7  2.7 000000 1015.0  1.0  0.0  0.8
05 7 23 02 03 97  3.7 86 11.2 -1.1 -4.0  2.7  2.9  4.5  5.9  6.2  7.0 10 0  0.7  0.5 000000 1017.0  1.4  5.2  0.7
06 8 20 05 02 97  9.3 89 10.5  3.7  6.8  7.1  7.1  6.9  6.3  6.0  7.0 10 0  0.0  1.1 000000 1017.5  0.0  0.0  0.6
07 1 19 02 02 97  6.5 94 10.6  1.6 -2.3  3.2  3.9  5.4  6.2  6.3  7.0 10 0  1.9  0.5 000000 1020.5  1.6  0.0  1.3
08 1 30 02 02 97  4.4 97  9.2  4.4 -1.0  5.6  5.8  6.6  6.5  6.2  7.1 10 0  0.0  6.0 000000 1017.5  0.0  0.0  0.6
09 0 00 00 02 97 -0.9 97  6.4 -1.9 -5.2  2.1  2.6  4.4  5.9  6.2  7.1 40 0  0.0  6.7 000000 1027.0  0.0 11.2  0.2
10 0 32 02 02 96 -2.3 91  7.0 -4.3 -6.3  0.5  1.4  2.9  4.8  5.6  7.1 40 0  0.0  2.8 000000 1036.5  0.0  9.8  0.0
11 8 23 05 02 97  7.0 93  9.6 -2.3 -2.0  3.0  2.6  3.2  4.4  5.0  6.9 10 0 tr    0.0 000000 1034.5  0.0  0.0  0.9
12 8 22 05 02 97  8.1 87  8.9  7.0  5.7  6.0  5.4  5.4  5.3  5.2  6.8 10 0  3.1  0.0 000000 1025.5  3.5  0.0  0.8
13 8 35 05 60 96  2.6 94  4.7  2.5  1.6  4.7  4.8  5.4  5.1  5.4  6.7 10 0  0.0  0.3 000000 1017.0  0.0  3.8  0.3
14 8 36 05 02 97  2.4 96  5.7 -1.9 -5.7  2.2  2.1  3.6  5.0  5.3  6.7 10 0  0.2  4.0 000000 1024.5  0.4  2.6  0.6
15 8 35 09 02 97  4.7 89  6.9  2.4  2.2  4.2  3.9  4.5  4.9  5.3  6.7 10 0  0.0  1.6 000000 1037.0  0.0  0.0  0.9
16 7 02 09 02 97  3.6 83  5.8  2.5 -2.0  3.7  3.4  4.2  4.9  5.2  6.5 10 0  0.0  4.2 000000 1041.5  0.0  2.0  0.9
17 8 32 02 02 97  4.9 98  7.6 -1.0 -4.4  3.4  3.1  3.9  4.7  5.0  6.5 10 0  0.0  0.8 000000 1038.5  0.0  0.0  0.3
18 2 36 02 01 97  3.7 95  7.7  0.1 -3.4  2.3  2.3  3.6  4.6  4.9  6.4 10 0 tr    1.5 000000 1036.0  0.0  0.0  0.8
19 7 34 05 20 97  6.8 93  7.4  3.7  1.0  4.4  4.3  4.6  4.9  4.9  6.4 10 0  0.0  0.0 000000 1038.0  0.0  2.7  0.8
20 7 36 02 02 96  0.3 95  5.5 -2.8 -5.8  2.7  1.4  3.5  4.7  5.0  6.4 40 0 tr    0.0 000000 1036.0  0.0  8.8  0.9
21 8 27 02 02 97  5.5 86  8.9  0.3  1.1  3.6  3.4  4.0  4.5  4.7  6.3 10 0  0.2  5.9 000000 1035.0  0.2  0.0  1.0
22 7 30 05 25 97  5.8 86  7.8  2.9 -2.4  3.2  3.3  3.9  4.5  4.7  6.2 10 0 tr    2.5 000000 1019.5  0.0  0.0  1.7
23 4 36 09 01 97  3.4 85  7.4  1.0 -3.6  2.4  2.5  3.5  4.5  4.7  6.1 10 0 tr    5.5 003000 1025.0  0.0  0.0  1.2
24 6 36 02 02 97  2.2 96  6.2  1.1 -1.3  2.5  2.4  3.5  4.3  4.5  6.2 10 0  0.0  6.7 000000 1025.5  0.0  4.0  0.6
25 7 00 00 02 97 -0.5 94  3.9 -2.7 -6.3  0.4  1.2  2.6  3.9  4.3  6.0 40 0  0.0  0.0 000000 1030.0  0.0  9.2  0.3
26 8 32 02 10 95 -0.5 97  6.2 -0.5 -1.2  2.1  2.1  2.9  3.8  4.1  5.9 10 0  0.0  6.7 000000 1034.5  0.0  7.0  1.2
27 0 00 00 10 94 -3.4 98  4.7 -5.4 -8.0  0.5  0.7  2.0  3.4  4.0  5.8 40 0  0.0  4.4 000000 1032.5  0.0 14.9  0.4
28 7 27 02 03 96  2.4 96 11.1 -3.4 -6.2  0.5  0.4  1.7  2.9  3.6  5.6 40 0  2.1  0.0 000000 1020.0  3.2  2.6  0.9
29 8 26 19 21 97 11.1 82 13.0  2.4  4.3  6.2  5.2  4.4  3.8  3.6  5.5 10 0 tr    1.3 000000 1001.0  0.0  0.0  1.7
30 8 26 13 02 97 11.9 84 12.5 10.3  6.4  7.2  6.6  6.0  5.3  4.4  5.5 10 0  0.0  0.3 000000 1015.0  0.0  0.0  2.3
31 8 25 13 02 97 11.6 83 12.5 10.9  6.5  7.9  7.2  6.9  6.1  5.4  5.8 10 0  0.2  0.1 000000 1021.5  0.4  0.0  1.0
-----------------------------------------------------------------------------------------------------------------
Mean
   5.9  4.4       4.6 92  8.4  1.6 -0.9  3.8  3.7  4.5  5.0  5.1  6.5                       1026.2
Total                                                                      17.8 69.7               21.7 83.8 24.7
1961-1990 Climatological
Mean5.5 6.7           89  7.1  1.1 -0.8  3.3  3.3  4.1  4.7  5.4  6.6      57.3 46.4        1015.1 57
-----------------------------------------------------------------------------------------------------------------
Snow                      days  1; mean  3.6;             50% snow cover at 09h     days  0; mean  3.5;
Hail                      days  0; mean  0.0;             Ice pellets               days  0; mean  0.3;
Thunder                   days  0; mean  0.3;             Fog at 09h                days  0; mean  2.5;
Gale                      days  0; mean  0.7;
Air frost                 days 11; mean 11.5;             Days with 0.2mm rain      days 11; mean 17.2*
Grass minimum frost       days 18; mean 17.8;             Days with 1.0mm rain      days  4; mean 11.9*
Soil frost                days 14                         Days with 5.0mm rain      days  1; mean  4.8*
                                                          Days with no sun          days  8; mean 14.0

Air pressure: max - 1041.5.0mb/16th, min - 1000.0mb/29th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 10 mist,
          20 recent drizzle, 21 recent rain, 25 recent rain shower, 41 fog, 60 intermittent light rain)
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 40 frozen, 50 glaze, X1 snow lying;
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evapoartion (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;
     G    gale;                    F    fog at 09GMT;
* Averages for Hurley (4km away)
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February 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR FEBRUARY 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 8 20 09 02 97  8.8 93 10.6  8.7  6.4  7.5  7.2  7.3  6.9  5.9  6.0 10 0 12.7  0.0 000000 1016.0  8.5  0.0  0.7
02 8 30 02 02 97  4.5 85 10.3  4.3  2.2  7.0  7.2  7.5  7.1  6.3  6.2 10 0  0.0  4.8 000000 1021.0  0.0  0.0  1.2
03 7 24 02 02 97  3.3 93  9.2  2.9 -2.5  4.4  4.5  5.7  6.6  6.3  6.5 10 0  0.3  0.0 000000 1034.5  0.3  0.0  0.5
04 8 22 09 02 97  9.2 91 10.8  3.3  3.1  6.2  6.2  7.1  6.4  6.2  6.6 10 0  0.0  0.0 000000 1033.0  0.0  0.0  0.9
05 8 23 05 02 96  7.9 85 10.9  7.9  5.2  7.3  7.1  7.3  6.9  6.3  6.8 10 0  0.0  2.0 000000 1028.5  0.0  0.0  0.9
06 8 22 02 02 96 10.3 95 11.6  7.9  3.1  7.8  7.3  7.4  7.2  6.5  6.9 10 0  2.5  0.2 000000 1020.0  2.0  0.0  0.7
07 7 33 02 01 97  7.7 85 11.2  4.0 -0.4  5.6  6.0  6.9  7.4  6.9  7.0 10 0  4.4  0.0 000000 1015.0  5.8  0.0  1.3
08 8 22 05 21 96 11.2 96 14.1  7.6  1.9  7.1  6.6  6.9  7.0  6.8  7.0 10 0  2.4  6.1 000000 1001.5  0.7  0.0  1.7
09 7 27 09 02 96  6.0 72 10.3  3.0 -0.4  4.9  5.0  6.0  6.9  6.7  7.1 10 0  1.3  0.8 000000 1025.0  1.5  0.0  2.2
10 8 22 19 61 96  8.5 95  9.7  6.0  4.1  6.3  6.5  6.8  6.9  6.6  7.1 10 0  2.7  2.7 000000 1009.0  1.7  0.0  0.7
11 0 00 00 02 96  4.0 96 10.0 -1.2 -5.4  2.7  3.2  4.8  6.2  6.4  7.1 40 0  2.6  7.3 000000 1029.5  1.0  8.7  1.5
12 8 23 19 62 95  6.7 90 10.3  4.0  0.5  5.8  5.3  5.6  6.0  6.2  7.1 10 0  1.0  3.9 000000 1016.5  0.6  0.0  1.1
13 0 27 02 02 97  5.0 75 10.9  3.4 -2.5  4.8  4.9  5.7  6.1  6.3  7.0 10 0  0.0  7.7 000000 1020.0  0.0  2.4  1.3
14 2 00 00 02 97 -1.0 97  9.6 -2.9 -6.3  1.7  2.3  4.1  5.7  6.1  7.0 40 0  2.9  0.0 000000 1021.5  2.6  9.3  1.0
15 1 30 02 02 97  6.1 75  8.3 -1.0 -2.5  4.0  4.4  5.2  5.7  5.7  6.9 10 0  1.9  2.4 000000 1020.0  1.7  0.0  0.9
16 1 30 02 02 97  4.5 73  7.7  0.9 -3.1  3.2  3.3  4.6  5.7  5.8  6.8 10 0  0.0  7.9 000000 1007.0  0.0  0.0  1.4
17 1 29 09 01 97  5.2 72  9.8  1.9 -2.5  3.3  3.7  4.0  5.3  5.5  6.7 10 0  4.3  5.7 000000 1014.5  4.5  0.0  1.5
18 8 32 02 02 97  8.4 83 11.6  4.9  1.8  6.0  5.4  5.8  5.8  5.5  6.6 10 0  0.3  5.8 000000 1006.0  0.6  0.0  1.7
19 8 36 02 02 97  6.7 83  9.3  5.9  0.9  5.6  5.4  6.0  6.1  5.8  6.6 10 0  0.0  6.7 000000 1014.5  0.0  0.0  1.3
20 6 36 02 02 97  0.8 94  9.3 -2.3 -6.0  2.3  2.8  4.5  5.8  5.8  6.8 40 0  1.0  6.8 000000 1031.5  2.7  8.0  0.9
21 8 24 05 21 96  6.7 95 10.5  0.7 -3.1  4.0  3.7  4.4  5.1  5.5  6.6 10 0 tr    7.0 000000 1027.0  0.0  0.0  0.8
22 7 25 02 03 97  2.2 93  9.7 -1.9 -5.1  2.2  2.5  4.0  5.1  5.5  6.6 40 0 tr    3.5 000000 1025.5  0.0  7.7  0.9
23 8 36 02 50 94  9.0 95 11.5  2.2  3.4  5.8  5.2  5.4  5.5  5.5  6.6 10 0 tr    0.0 000000 1022.5  0.0  0.0  0.8
24 7 26 02 02 97  7.4 93 10.8  7.1  1.0  6.8  7.0  7.0  6.5  5.8  6.5 10 0 15.6  0.8 000000 1025.0  8.2  0.0  0.9
25 0 35 02 02 97  3.7 95 11.0  1.7 -2.6  4.6  5.1  6.3  6.8  6.2  6.6 10 0  0.0  9.0 000000 1029.5  0.0  0.5  1.1
26 6 30 02 03 97  1.8 94 10.6 -1.7 -4.3  2.9  3.3  5.0  6.1  6.3  6.8 40 0  0.0  5.6 000000 1031.0  0.0  8.2  1.8
27 8 20 13 02 97 10.2 83 12.0  1.8  6.5  7.4  6.9  6.8  6.5  6.2  6.8 10 0  8.4  0.0 000000 1018.0  7.7  0.0  1.3
28 8 34 05 61 95  7.6 94 11.0  6.6  5.7  7.5  7.3  7.5  7.2  6.6  6.9 10 0  5.1  5.2 000000 1010.5  5.3  0.0  1.7
29 8 22 13 61 13  8.0 90 10.0  5.2  1.0  6.6  6.2  6.6  6.6  6.7  7.0 10 0  2.9  0.0 000000  999.5  2.5  0.0  0.6
-----------------------------------------------------------------------------------------------------------------
Mean
   5.9  5.2       6.2 88 10.4  3.1  0.0  5.2  5.2  5.9  6.3  6.1  6.8                       1019.8
Total
                                                                           72.3  101.9             57.9 44.8 33.3
1961-1990 Climatological
Mean5.7 6.5           88  7.8  1.3 -1.3  2.9  3.3  4.1  4.6  5.1  6.0      39.3 65.2        1015.5 43
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  3.4;             50% snow cover at 09h     days  0; mean  2.1;
Hail                      days  0; mean  0.2;             Ice pellets               days  0; mean  0.4;
Thunder                   days  0; mean  0.2;             Fog at 09h                days  0; mean  2.0;
Gale                      days  0; mean  0.4;
Air frost                 days  6; mean 10.0;             Days with 0.2mm rain      days 18; mean 12.6*
Grass minimum frost       days 14; mean 17.7;             Days with 1.0mm rain      days 16; mean  8.4*
Soil frost                days  8                         Days with 5.0mm rain      days  4; mean  3.0*
                                                          Days with no sun          days  8; mean  9.5

Air pressure: max - 1035.5mb/3rd, min - 997.0mb/29th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing,
          21 recent rain, 50 intermittent light drizzle, 61 continuous light rain, 62 intermittent moderate rain)
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 40 frozen, x2 50% snow cover)
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;
     G    gale;                    F    fog at 09GMT;
* Averages for Hurley (4km away)

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March 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR MARCH 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 7 36 05 02 97  5.9 84  9.0  2.9 -0.5  4.6  5.1  6.0  6.9  6.7  7.0 10 0  1.7  6.4 000000 1010.0  1.8  0.0  1.5
02 8 35 05 60 96  4.7 94 11.0  0.6 -2.4  3.8  3.9  5.5  6.2  6.4  7.0 10 0  8.0  0.0 000000 1021.0  5.9  0.0  1.0
03 8 32 09 63 96  7.0 89 12.0  4.7  6.6  7.6  7.3  7.1  6.6  6.4  7.0 10 0  0.9  4.9 000000 1008.0  0.1  0.0  1.8
04 3 36 05 02 97  3.7 75  9.0  0.1 -1.9  3.1  3.6  5.4  6.6  6.5  7.1 10 0 tr    8.0 000000 1028.0  0.0  0.0  1.3
05 7 35 02 02 97  4.5 82 10.4 -0.8 -3.4  3.3  3.4  4.7  5.9  6.2  7.1 10 0 tr    6.7 000000 1034.5  0.0  2.7  1.5
06 8 23 09 03 97  8.5 84 11.4  4.5  0.8  5.8  5.2  5.9  6.1  6.2  7.0 10 0  0.0  0.0 000000 1028.0  0.0  0.0  0.7
07 7 25 09 02 97 10.3 79 14.1  8.5  4.7  7.4  7.2  6.8  6.8  6.4  7.0 10 0 tr    4.7 000000 1025.5  0.0  0.0  1.6
08 8 22 13 80 97 12.0 83 14.7 10.3  7.2  8.7  8.8  8.4  7.7  7.0  7.0 10 0  0.0  0.3 000000 1023.0  0.0  0.0  1.2
09 8 29 13 02 97 12.0 92 17.8 11.2  8.0  9.6  9.9  9.2  8.5  7.4  7.1 10 0 tr    4.0 000000 1026.5  0.0  0.0  2.0
10 8 25 05 02 96 11.9 91 15.0 11.4  8.5 10.0  9.9  9.7  9.1  8.1  7.5 10 0  0.0  1.0 000000 1029.5  0.0  0.0  1.1
11 7 25 09 02 97 11.1 73 13.5  7.6  5.0  8.9  8.9  9.2  9.1  8.4  7.7 10 0  0.0  3.2 000000 1021.5  0.0  0.0  1.6
12 0 27 02 02 97  8.0 81 15.3  0.9 -1.0  5.9  6.4  7.9  8.7  8.2  7.9 10 0  0.0  8.2 000000 1027.5  0.0  0.0  1.2
13 7 32 02 03 96  7.8 90 15.0  4.0  1.5  6.6  6.7  7.8  8.4  8.2  8.0 10 0  0.0  0.4 000000 1028.0  0.0  0.0  1.1
14 8 26 09 02 97 11.0 80 13.0  7.8  6.0  8.6  8.7  9.1  8.7  8.2  8.1 10 0  0.0  0.5 000000 1024.5  0.0  0.0  2.2
15 0 34 02 02 97  8.7 74 13.5  2.9 -0.9  5.5  5.9  7.5  8.5  8.2  8.1 10 0  0.0 10.2 000000 1036.0  0.0  0.0  1.7
16 7 24 02 03 97  8.6 78 12.1  3.1 -0.9  6.7  6.8  7.9  8.3  8.2  8.1 10 0  0.0  0.0 000000 1036.0  0.0  0.0  1.9
17 8 30 05 02 97  8.9 80 10.4  8.1  6.5  7.9  7.9  8.5  8.4  8.2  8.1 10 0  0.0  0.0 000000 1035.5  0.0  0.0  1.8
18 8 36 13 02 97  8.1 79 10.9  8.0  6.2  7.9  7.8  8.4  8.4  8.1  8.2 10 0  0.0  7.2 000000 1037.0  0.0  0.0  1.9
19 8 33 02 02 97  5.1 83 12.9  1.5 -2.4  6.1  6.0  7.1  8.1  8.1  8.2 10 0  0.0  7.8 000000 1038.0  0.0  0.0  1.3
20 9 00 00 45 03  5.4 97 13.4  0.6 -2.5  5.7  5.9  6.9  7.8  7.8  8.2 10 0  0.0  0.3 000000 1032.0  0.0  0.0  1.1
21 2 30 02 02 95  7.9 87 14.9  1.8 -1.2  5.8  6.3  7.5  8.1  7.8  8.1 00 0  0.0  8.2 000000 1025.0  0.0  0.0  1.5
22 9 00 00 45 02  5.5 99 15.7  1.9 -1.5  6.5  6.6  7.7  8.1  7.9  8.1 00 0  0.0  4.7 000000 1018.0  0.0  0.0  1.2
23 8 17 02 60 96  9.7 75 14.4  4.9  1.4  7.2  7.2  8.0  8.2  7.9  8.1 00 0  2.3  0.0 000000 1013.0  5.8  0.0  1.3
24 8 20 02 02 96 10.2 95 14.2  6.6  2.6  8.1  8.1  8.8  8.6  8.2  8.1 10 0  0.0  5.1 000000 1007.0  0.0  0.0  1.5
25 1 30 02 02 97 10.0 70 12.3  1.7 -1.1  6.2  6.4  7.8  8.5  8.3  8.3 10 0  1.3  6.7 000000 1011.0  0.3  0.0  2.0
26 1 00 00 02 97  8.7 85 12.2 -0.8 -3.3  4.0  5.0  6.5  7.9  8.1  8.1 10 0  0.2  5.5 000000 1009.5  0.3  3.9  2.0
27 8 35 05 50 96  4.8 87 10.5  4.2 -2.0  6.5  6.5  7.5  8.1  8.0  8.2 10 0  1.0  3.0 000000 1016.0  0.4  0.0  1.6
28 7 26 13 02 97  5.7 86  8.2  4.1  2.0  6.0  6.5  7.2  7.9  7.8  8.2 10 0  1.1  0.5 000000 1023.0  5.1  0.0  1.0
29 8 04 05 21 96  5.7 95  6.8  4.0  1.5  5.9  5.9  6.8  7.5  7.5  8.2 10 0  0.0  0.0 000000 1020.0  0.0  0.0  0.8
30 8 04 13 02 97  6.1 87  8.1  5.3  4.7  5.9  6.0  6.8  7.1  7.2  8.1 00 0  0.0  0.0 000000 1017.0  0.0  0.0  1.0
31 7 03 02 02 97  6.0 88 11.0  4.9  2.6  6.1  6.1  6.9  7.2  7.2  8.0 00 0 tr    4.2 000000 1010.5  0.0  0.0  1.2
-----------------------------------------------------------------------------------------------------------------
Mean
   6.3  5.4       7.9 85 12.3  4.4  1.6  6.5  6.6  7.4  7.8  7.6  7.8                       1023.2
Total                                                                      16.5 111.7              19.7  6.6 44.6
1961-1990 Climatological
Mean6.0 6.3           83 10.7  2.7  0.0  4.6  4.9  5.8  5.9  6.2  6.4      51.6 106.1       1015.0 57
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  2.7;             50% snow cover at 09h     days  0; mean  0.6;
Hail                      days  0; mean  0.5;             Ice pellets               days  0; mean  0.5;
Thunder                   days  0; mean  0.5;             Fog at 09h                days  0; mean  0.8;
Gale                      days  0; mean  0.4;
Air frost                 days  2; mean  6.4;             Days with 0.2mm rain      days  8; mean 15.3*
Grass minimum frost       days 14; mean 15.5;             Days with 1.0mm rain      days  6; mean 10.6*
Soil frost                days  3                         Days with 5.0mm rain      days  1; mean  3.9*
                                                          Days with no sun          days  7; mean  6.4

Minimum humidity: 44%/21st     Air pressure: max - 1038.0mb/19th, min - 1003.0mb/1st,3rd

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 21 recent rain,
                     45 fog, 50 intermittent light drizzle, 60 intermittent light rain,
                     80 light rain shower);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 40 frozen, 50 glaze;
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;
     G    gale;                    F    fog at 09GMT;
* Averages for Hurley (4km away)

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April 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR APRIL 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 7 30 02 02 97  6.1 84 11.4  0.7 -2.2  5.5  5.5  6.7  7.5  7.3  8.0 00 0  2.7  1.2 000000 1003.5  8.3  0.0  0.7
02 8 22 02 02 97  9.4 83 13.9  6.1  4.5  7.9  7.6  7.9  7.9  7.4  8.0 10 0 22.7  0.3 000000 1000.5 14.0  0.0  1.3
03 8 02 05 63 94  8.3 96  8.5  8.2  2.7  8.3  8.3  8.6  8.5  7.7  7.9 20 0 19.1  0.0 500000  991.0 21.4  0.0  0.4
04 8 01 13 61 95  3.4 92  5.5  1.4 -0.5  4.6  4.9  6.4  7.7  7.7  8.0 20 0  1.8  0.0 500000  999.0  4.3  0.0  1.6
05 7 35 13 02 97  5.5 83 10.4  2.7  0.4  4.2  4.4  5.8  6.7  7.0  8.0 10 0  0.0  3.5 000000 1018.5  0.0  0.0  1.9
06 0 33 02 02 97  7.3 61 10.8  0.7 -3.1  3.8  4.2  5.7  6.6  6.7  7.9 10 0  0.0 11.6 000000 1032.0  0.0  0.0  2.0
07 0 27 02 02 96 10.4 75 15.3  0.8 -2.5  4.4  4.8  6.2  6.9  7.0  7.7 00 0  0.0  9.9 000000 1035.5  0.0  0.0  1.9
08 3 21 02 03 97 10.6 63 17.3  0.0 -2.6  5.2  5.5  7.0  7.6  7.2  7.7 00 0  0.4 10.7 000000 1027.0  1.2  0.0  2.7
09 8 31 09 02 97  8.9 82 15.1  6.4  5.6  7.6  7.8  8.3  8.2  7.7  7.8 10 0  0.0  7.5 000000 1015.5  0.0  0.0  2.5
10 0 07 09 02 97  8.3 63 18.0  4.1  1.5  6.1  6.6  7.9  8.4  7.8  7.9 00 0  1.9 10.8 000000 1018.0  1.4  0.0  2.7
11 8 22 02 03 97  5.4 94  7.7  0.9 -2.0  6.6  6.7  7.9  8.3  8.1  8.1 00 0 11.6  0.0 000000  996.5  8.8  0.0  0.2
12 8 31 02 02 95  3.9 93  5.9  1.6  1.3  6.1  6.4  7.3  7.9  7.8  8.1 10 0  5.1  0.0 100000  987.0  5.1  0.0  0.3
13 8 27 09 02 97  5.7 88 10.0  3.7  1.3  6.1  6.4  7.0  7.5  7.5  8.1 10 0  2.1  1.1 000000  992.5  2.0  0.0  0.4
14 8 27 02 02 97  6.5 80  9.5  3.7  0.2  6.4  6.5  7.2  7.6  7.5  8.0 10 0  9.5  0.4 000000 1002.0  6.2  0.0  0.7
15 8 22 05 61 95  3.2 96  7.9  2.6  2.5  5.6  5.8  7.0  7.6  7.4  8.0 20 0  4.4  0.0 100000  995.0  3.2  0.0  0.1
16 0 00 00 44 04  7.9 98 13.9  0.1 -2.0  4.5  4.7  5.9  6.8  7.2  7.9 10 0  4.6  6.2 000000 1000.0  2.4  0.0  1.9
17 7 26 13 25 97  8.5 74 11.9  6.5  3.0  8.2  8.1  7.9  7.9  7.3  7.9 10 0  3.4  6.9 004100  994.5  0.9  0.0  1.3
18 7 11 05 02 97 10.2 79 11.6  4.7  0.0  6.8  6.7  7.5  7.9  7.5  7.9 10 0  4.3  0.1 000000 1004.0  4.2  0.0  0.7
19 2 22 02 02 97 11.0 75 16.5  5.3  2.1  7.7  7.8  8.5  8.2  7.7  7.9 10 0  2.4  9.7 000000 1009.5  2.4  0.0  2.0
20 8 22 05 60 97 12.0 95 13.9 10.8  9.5 10.8 10.5 10.4  9.4  8.4  8.0 10 0  4.5  0.2 000000 1007.0  3.6  0.0  0.9
21 7 20 09 02 97 11.1 87 15.0  7.3  4.0  9.9  9.4  9.8  9.5  8.8  8.2 10 0  2.2  4.4 000000 1010.0  1.7  0.0  1.5
22 8 20 02 02 95 10.9 97 15.8  7.7  4.0  9.5  9.4 10.0  9.8  9.0  8.4 20 0  0.0  4.5 000000 1008.5  0.0  0.0  1.1
23 8 22 05 02 94  9.7 85 15.7  6.1  2.2  9.0  9.5 10.3  9.9  9.3  8.4 10 0  0.1  5.0 000000 1012.0  0.1  0.0  1.3
24 7 18 09 02 95 11.3 81 15.0  5.4  2.5  9.7  9.9 10.5 10.2  9.5  8.6 10 0  3.6  4.5 000000 1013.0  4.0  0.0  1.0
25 8 18 09 25 97 12.1 91 14.3  9.7  8.5 10.6 10.7 11.3 10.7  9.7  8.8 10 0  2.2  1.5 000000 1006.0  3.3  0.0  0.9
26 8 18 05 02 96 10.8 93 15.1  9.7  7.5 10.2 10.2 11.2 10.8  9.8  9.0 10 0  4.3  4.0 000000 1006.5  1.4  0.0  1.6
27 7 13 05 02 96 12.8 75 16.1  6.3  2.0 10.0 10.2 11.0 10.8  9.9  9.1 10 0  0.0  4.0 000000 1012.5  0.0  0.0  1.5
28 8 00 00 61 95 11.0 95 12.8  8.9  3.0 10.1 10.3 11.3 11.0 10.0  9.2 10 0  7.8  0.0 000000 1009.5  4.4  0.0  0.4
29 1 22 09 02 97 14.2 63 18.7  5.0  6.5 11.2 11.5 11.4 11.2 10.3  9.4 10 0  0.0 12.0 000000 1016.0  0.0  0.0  2.5
30 7 18 02 03 97 11.4 77 18.0  4.8  2.1 10.3 10.4 11.2 11.4 10.5  9.5 10 0  0.0  8.0 000000 1023.5  0.0  0.0  2.1
-----------------------------------------------------------------------------------------------------------------
Mean
   6.1  5.3       8.9 83 13.1  4.7  2.1  7.6  7.7  8.5  8.7  8.2  8.2                       1008.2
Total                                                                     120.7 128.0             104.3  0.0 40.1
1961-1990 Climatological
Mean5.1 6.1           77 13.5  4.8  2.0  7.2  7.7  8.2  8.7  8.3  8.0      45.9 140.9       1015.2 45
-----------------------------------------------------------------------------------------------------------------
Snow                      days  4; mean  1.0;             50% snow cover at 09h     days  0; mean  0.1;
Hail                      days  0; mean  0.3;             Ice pellets               days  1; mean  0.3;
Thunder                   days  1; mean  0.6;             Fog at 09h                days  0; mean  0.1;
Gale                      days  0; mean  0.0;
Air frost                 days  0; mean  2.1;             Days with 0.2mm rain      days 21; mean 14.1*
Grass minimum frost       days  7; mean  9.2;             Days with 1.0mm rain      days 20; mean 10.1*
Soil frost                days  2                         Days with 5.0mm rain      days  6; mean  3.4*
                                                          Days with no sun          days  6; mean  3.4

Relative humidity: min - 31%/8th; Air pressure: max - 1035.5mb/7th min - 985.0mb/12th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 25 recent rain shower, 44 fog,
           60 intermittent light rain, 61 continuous light rain, 63 continuous moderate rain);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 40 frozen, 50 glaze);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;
     G    gale;                    F    fog at 09GMT;
* Averages for Hurley (4km away)
Wettest April in Maidenhead since before 1859.
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May 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR MAY 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 7 03 09 02 97 10.2 76 17.0  7.3  4.2 11.0 11.0 11.6 11.5 10.5  9.8 10 0  0.0  6.8 000000 1025.5  0.0  0.0  2.1
02 8 03 09 02 97 10.5 81 15.5  8.7  7.8 11.2 11.2 12.4 11.8 10.9  9.9 10 0 tr    6.5 000000 1027.5  0.0  0.0  2.0
03 8 12 09 50 97  9.9 74 11.8  8.7  6.4 11.0 11.0 11.7 11.6 10.9 10.0 10 0 tr    0.0 000000 1026.0  0.0  0.0  0.9
04 8 04 09 02 97  8.9 88 12.9  8.5  6.8 10.4 10.4 11.1 11.1 10.7 10.1 10 0  0.0  0.1 000000 1025.0  0.0  0.0  1.4
05 8 05 09 02 97 12.7 75 19.1  7.5  5.9 10.1 10.1 10.9 10.9 10.4 10.1 10 0  0.0  9.6 000000 1019.0  0.0  0.0  1.8
06 7 12 05 02 97 14.0 78 25.9  7.7  5.9 11.1 11.1 11.5 11.4 10.7 10.1 10 0  0.0 10.5 000000 1014.0  0.0  0.0  2.9
07 4 15 05 02 97 19.2 69 23.8 12.5  9.7 13.4 13.4 13.4 12.5 11.3 10.2 10 0  1.0  7.8 000100 1016.0  0.7  0.0  2.1
08 8 09 05 60 95 12.7 93 19.7 10.6 10.1 13.4 13.4 14.1 13.5 12.1 10.5 10 0  0.0  2.5 000000 1018.0  0.0  0.0  0.9
09 8 00 00 44 05 15.6 95 23.3 10.2  8.8 13.1 13.1 13.6 13.3 12.2 10.8 10 0  0.0  4.3 000000 1019.0  0.0  0.0  1.7
10 7 09 05 02 97 14.9 73 18.7 13.6 11.6 14.5 14.5 14.9 14.0 12.7 11.0 00 0  6.5  2.5 000000 1018.5  3.1  0.0  1.6
11 7 03 13 02 97 12.5 96 17.5 10.7  9.7 13.2 13.2 13.9 13.9 12.8 11.2 10 0  3.3  3.6 000000 1019.5  3.8  0.0  1.7
12 7 05 05 02 97 14.1 80 19.9  8.4  7.3 11.8 11.8 12.9 13.1 12.7 11.4 10 0 tr    4.3 000000 1021.0  0.0  0.0  1.3
13 9 00 00 45 03 18.0 79 24.9 10.5  8.7 13.5 13.5 14.2 13.7 12.7 11.5 10 0  0.0  6.3 000000 1021.5  0.0  0.0  1.7
14 7 00 00 02 10 19.9 85 25.4 11.7  9.8 15.1 15.1 15.5 14.7 13.3 11.6 00 0  0.0 10.5 000000 1023.0  0.0  0.0  2.0
15 4 18 02 02 96 21.5 69 26.5 15.2 13.8 16.2 16.2 16.4 15.5 13.9 11.9 00 0  0.0 11.6 000000 1018.5  0.0  0.0  2.0
16 7 15 02 02 96 19.0 67 22.5 14.8 11.7 16.5 16.5 16.9 16.0 14.4 12.1 00 0  0.0  8.7 000000 1011.0  0.0  0.0  4.4
17 5 29 19 01 97 13.0 66 16.7 10.9  9.3 14.9 14.9 16.8 15.9 14.7 12.5 00 0  2.5  5.1 000000 1011.0  1.8  0.0  2.3
18 1 32 09 02 97 12.7 72 17.1  6.8  4.5 13.0 13.0 14.7 15.0 14.4 12.8 10 0  6.0  6.3 004100 1008.0  1.3  0.0  1.3
19 8 27 09 02 97 12.4 67 16.0  9.7  6.9 12.9 12.9 14.0 14.5 14.0 12.8 10 0  0.3  4.9 000000 1009.0  0.5  0.0  1.6
20 2 32 05 02 97 13.5 68 16.9  3.8  1.6 11.2 11.2 12.8 14.0 13.6 12.8 10 0  9.3  5.8 000000 1014.5 12.7  0.0  1.7
21 8 28 05 21 94 11.2 85 17.0  8.7  7.7 12.8 12.8 13.5 13.9 13.4 12.6 10 0  1.1  6.2 000000 1007.5  0.2  0.0  1.4
22 0 28 02 02 97 15.7 72 19.1  7.4  4.6 12.2 12.2 13.3 13.7 13.2 12.6 10 0  0.3  8.8 000000 1016.0  0.5  0.0  2.2
23 8 22 05 60 97 13.5 87 14.1 11.6 10.7 14.1 14.1 14.6 14.3 13.3 12.6 10 0  3.2  0.0 000000 1014.5  5.3  0.0  0.5
24 8 20 02 02 97 13.3 77 17.3  9.9  7.2 13.2 13.2 13.8 13.8 13.4 12.6 10 0  5.5  3.0 000000 1015.0  6.0  0.0  1.3
25 1 29 02 02 97 14.3 61 16.5  9.2  9.7 12.9 12.9 13.9 14.0 13.2 12.6 10 0  1.0 10.3 000000 1012.0  0.4  0.0  2.3
26 8 20 02 02 97 12.7 85 12.9 10.0  7.8 12.9 12.9 13.6 13.9 13.3 12.6 10 0 15.5  0.0 000000 1012.5 12.1  0.0  0.4
27 2 25 09 02 97 11.7 70 14.9  6.5  5.6 11.2 11.2 12.4 13.4 12.9 12.6 10 0 22.0  7.5 005100 1009.0 10.4  0.0  1.4
28 8 25 09 02 95  9.4 93 15.4  5.6  5.8 11.0 11.0 12.2 13.0 12.8 12.6 10 0  8.1  7.5 000100 1002.5  5.5  0.0  1.2
29 1 30 05 02 97 13.4 75 18.1  5.8  3.1 10.7 10.7 11.9 12.9 12.7 12.5 10 0  0.5 10.6 000000 1015.0  1.7  0.0  1.7
30 7 22 02 01 97 13.3 72 15.3  8.7  5.7 12.1 12.1 13.0 13.2 12.7 12.4 10 0  0.0  1.2 000000 1015.0  0.0  0.0  1.5
31 6 23 02 03 97 15.3 64 20.1  4.9  2.8 10.8 10.8 12.1 12.9 12.6 12.4 10 0  2.0  9.6 000000 1020.5  1.5  0.0  2.6
-----------------------------------------------------------------------------------------------------------------
Mean
   5.9  5.6      13.8 77 18.4  9.2  7.5 12.6 12.6 13.5 13.4 12.7 11.7                       1016.3
Total                                                                      88.1 182.4              67.5  0.0 53.9
1961-1990 Climatological
Mean4.9 6.4           73 17.1  7.9  5.6 10.7 10.7 12.1 12.2 11.2 10.1      54.1 187.3       1015.2 46
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  0.1;             50% snow cover at 09h     days  0; mean  0.0;
Hail                      days  1; mean  0.3;             Ice pellets               days  1; mean  0.1;
Thunder                   days  4; mean  1.8;             Fog at 09h                days  0; mean  0.1;
Gale                      days  0; mean  0.0;
Air frost                 days  0; mean  0.2;             Days with 0.2mm rain      days 17; mean 13.7*
Grass minimum frost       days  0; mean  2.0;             Days with 1.0mm rain      days 14; mean 10.3*
Soil frost                days  0                         Days with 5.0mm rain      days  7; mean  3.6*
Concrete frost            days  0                         Days with no sun          days  3; mean  2.3

Air pressure: max - 1027.5mb/2nd min - 995.0mb/28th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing,
                     21 recent rain, 44,45 fog, 50 intermittent light drizzle, 60 intermittent light rain);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 90 cracked);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;
     G    gale;                    F    fog at 09GMT;
* Averages for Hurley (4km away)
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June 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR JUNE 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 8 23 05 60 97 13.6 95 17.1 12.2 11.1 13.9 13.9 14.3 13.8 12.8 12.3 10 0 tr    3.0 000000 1017.0  0.0  0.0  1.0
02 8 21 09 02 97 16.0 84 18.0 12.0 10.0 13.8 13.6 14.0 13.8 12.9 12.4 10 0  0.0  0.0 000000 1018.5  0.0  0.0  1.4
03 7 18 02 02 97 17.0 81 22.6 12.0 11.0 14.7 14.3 14.4 13.9 13.1 12.4 10 0  0.0  5.4 000000 1019.0  0.0  0.0  1.7
04 7 27 09 02 97 17.2 62 19.3 10.8  8.3 15.2 14.9 15.5 15.0 13.7 12.5 10 0  0.0  4.4 000000 1017.5  0.0  0.0  1.8
05 8 15 09 02 96 13.2 86 15.7  9.5  8.0 14.3 14.6 15.4 15.0 14.0 12.8 10 0  0.0  0.0 000000 1019.5  0.0  0.0  0.8
06 8 22 02 02 96 15.2 74 19.2  8.9  7.4 13.4 13.7 14.4 14.4 13.9 12.9 10 0  1.6  6.8 000000 1020.5  0.6  0.0  1.7
07 3 21 13 02 97 15.4 60 20.6  8.0  7.0 13.2 13.6 14.2 14.5 13.9 13.0 10 0  0.0 11.6 000000 1026.0  0.0  0.0  1.9
08 7 23 05 02 97 17.0 71 22.8 12.1  9.0 14.4 14.4 15.4 14.9 14.0 13.0 10 0  1.4  9.7 000000 1016.5  1.0  0.0  3.5
09 7 22 02 03 97 16.1 93 19.1 12.7 10.0 15.1 15.0 15.6 15.3 14.3 13.1 10 0  1.3  0.1 000000 1007.5  1.8  0.0  1.2
10 7 25 05 03 97 13.5 81 20.2  8.4  6.0 15.4 14.8 14.9 14.8 14.2 13.2 10 0  0.0 10.3 000000 1018.5  0.0  0.0  2.5
11 6 25 09 03 97 16.2 63 20.2 11.2  8.2 14.6 14.7 15.3 15.1 14.3 13.3 00 0  0.0  7.2 000000 1018.0  0.0  0.0  2.6
12 7 24 02 02 97 19.0 69 25.5 11.5  8.9 15.4 15.0 15.4 15.3 14.4 13.4 00 0 tr   10.9 000000 1024.0  0.0  0.0  2.5
13 8 25 09 02 97 16.0 87 22.9 14.4 14.1 16.6 16.8 17.1 16.2 14.9 13.4 00 0  0.0  1.6 000000 1024.5  0.0  0.0  1.8
14 8 25 09 02 97 17.0 85 21.6 14.7 12.0 16.7 16.7 17.0 16.4 15.2 13.6 00 0  0.0  0.3 000000 1023.5  0.0  0.0  1.6
15 8 32 02 02 97 16.9 82 20.1 15.3 13.8 16.6 16.7 17.0 16.4 15.3 13.8 00 0  0.0  0.4 000000 1026.0  0.0  0.0  1.0
16 8 34 05 44 07 16.9 91 23.3 12.7 10.4 16.1 16.2 16.6 16.1 15.3 13.9 00 0  0.0  2.9 000000 1027.5  0.0  0.0  1.8
17 1 18 02 02 97 22.5 57 26.7 13.1 10.2 15.9 16.1 16.8 16.5 15.5 14.1 00 0  0.0 12.5 000000 1027.0  0.0  0.0  3.6
18 0 18 02 02 97 23.6 48 30.6 12.9 10.2 17.1 17.1 17.9 17.4 16.1 14.2 00 0  0.0 14.9 000000 1024.0  0.0  0.0  5.4
19 1 18 02 02 97 25.1 56 30.5 16.0 11.9 18.3 18.3 18.9 18.1 16.8 14.4 00 0  0.1 12.9 000000 1014.5  0.1  0.0  4.1
20 8 22 02 02 97 17.2 97 21.1 14.9 11.4 18.8 18.9 19.5 19.0 17.4 14.8 00 0  6.2  0.3 000100 1012.5  2.8  0.0  1.0
21 6 31 13 01 97 17.0 87 19.3 15.5 12.2 17.7 17.8 18.3 18.1 17.2 15.1 10 0  0.0  0.7 000000 1009.5  0.0  0.0  2.6
22 6 23 09 02 97 16.0 76 18.4 13.0  9.1 15.6 15.9 17.0 17.3 16.8 15.2 10 0  0.6  4.0 000000 1010.5  0.3  0.0  2.0
23 6 32 02 02 97 15.9 75 19.7 12.6 10.5 15.6 15.7 16.7 16.8 16.5 15.1 10 0 tr    3.4 000000 1017.0  0.0  0.0  2.2
24 8 30 09 02 97 13.0 79 17.0  8.6  5.2 14.4 14.8 15.9 16.4 16.2 15.1 10 0 tr    0.1 000000 1018.5  0.0  0.0  1.9
25 6 36 02 02 97 16.3 71 18.5  8.6  5.1 15.1 14.8 15.5 15.7 15.9 15.1 10 0 tr    2.3 000000 1022.0  0.0  0.0  2.0
26 8 00 00 60 96 15.2 77 20.4 12.4 12.4 14.9 15.3 16.0 16.0 15.7 15.0 10 0  0.0  2.2 000000 1025.5  0.0  0.0  2.1
27 2 00 00 02 97 18.3 64 22.1  9.8  8.6 14.7 15.1 16.2 16.4 15.8 14.9 00 0  0.0 10.1 000000 1024.5  0.0  0.0  3.2
28 8 15 02 02 97 15.0 71 23.0 11.6 10.0 15.9 16.2 17.1 16.8 16.1 14.9 00 0  0.0  1.5 000000 1021.0  0.0  0.0  2.4
29 8 15 02 02 97 16.0 81 20.3 14.5 14.0 16.6 16.9 17.6 17.0 16.3 15.0 00 0  7.8  1.0 000000 1021.0  5.4  0.0  1.5
30 8 20 02 02 94 14.3 95 20.3 14.0 14.9 16.4 16.6 17.3 16.8 16.2 15.0 10 0 tr    0.4 000000 1016.5  0.0  0.0  1.1
-----------------------------------------------------------------------------------------------------------------
Mean
   6.4  4.9      16.7 77 21.2 12.1 10.0 15.5 15.6 16.2 16.0 15.2 13.9                       1019.6
Total                                                                      19.0 140.9              12.0  0.0 63.9
Climatological
Mean5.3 5.6           72 20.0 10.7  9.0 14.3 14.5 15.6 15.2 14.1 12.5      52.6 191.8       1017.0 41
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  0.0;             50% snow cover at 09h     days  0; mean  0.0;
Hail                      days  0; mean  0.1;             Ice pellets               days  0; mean  0.0;
Thunder                   days  1; mean  2.3;             Fog at 09h                days  0; mean  0.1;
Gale                      days  0; mean  0.0;
Air frost                 days  0; mean  0.0;             Days with 0.2mm rain      days  6; mean 11.5*
Grass minimum frost       days  0; mean  0.0;             Days with 1.0mm rain      days  5; mean  8.2*
Soil frost                days  0                         Days with 5.0mm rain      days  2; mean  3.6*
Concrete frost            days  0                         Days with no sun          days  2; mean  2.1

Relative humidity: min - 20%/18th; Air pressure: max - 1027.5mb/16th min - 1007.0mb/9th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 44 fog,
          60 intermittent light rain)
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 90 cracked);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;
     G    gale;                    F    fog at 09GMT;
* Averages for Hurley (4km away)
Unusually dry air during the afternoon of the 18th.
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July 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR JULY 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 8 18 02 21 97 18.1 95 21.5 14.5 14.2 16.6 16.7 17.0 16.0 16.1 15.1 10 0  0.2  3.7 000000 1010.0  0.4  0.0  1.1
02 8 24 02 02 96 16.1 88 21.7 12.7 12.2 16.6 16.4 16.8 16.7 16.1 15.1 10 0  0.0  0.1 000000 1011.0  0.0  0.0  1.4
03 7 00 00 02 97 19.4 80 23.4 13.1 12.7 16.6 16.8 17.4 17.0 16.2 15.1 10 0 tr    1.5 000000 1010.5  0.0  0.0  1.8
04 8 22 05 02 96 15.7 96 17.1 14.7 12.6 17.2 17.4 18.0 17.5 16.5 15.1 10 0 19.3  0.0 000000 1008.0 14.2  0.0  0.6
05 8 25 02 61 95 14.9 94 17.1 13.8 13.6 16.1 16.1 16.8 16.8 16.4 15.2 10 0  0.1  0.5 000000 1013.0  0.2  0.0  0.5
06 8 28 05 02 96 15.9 91 21.9 12.3 10.6 15.7 15.8 16.4 16.4 16.0 15.3 10 0 18.5  1.4 000100 1019.5  2.5  0.0  1.3
07 8 17 05 02 97 14.8 75 17.5 13.0 12.2 15.7 16.1 16.8 16.6 16.0 15.2 10 0  0.0  2.5 000000 1018.5  0.0  0.0  1.8
08 7 18 02 03 97 16.8 65 18.6 11.0  8.9 14.8 14.9 15.7 16.1 15.8 15.2 10 0  0.3  1.7 000000 1019.0  0.4  0.0  1.6
09 8 27 05 02 96 16.7 85 18.4 14.6 13.1 15.8 15.8 16.2 16.2 15.7 15.1 10 0  4.7  1.1 000000 1001.0  2.4  0.0  0.8
10 8 33 14 02 97 15.9 69 16.5 11.6 10.4 15.3 15.5 16.1 16.2 15.7 15.1 10 0 10.3  1.5 000000  993.0  4.8  0.0  0.9
11 1 36 09 02 97 14.7 61 16.2  8.7  6.9 13.0 13.7 14.9 15.6 15.5 15.1 10 0  0.0  7.6 000000 1006.0  0.0  0.0  2.3
12 7 27 02 03 97 14.8 71 19.6  6.7  5.2 12.8 13.1 14.5 15.4 15.2 15.0 10 0  5.3  1.7 000000 1016.5  5.7  0.0  1.4
13 8 26 02 21 96 14.9 97 20.9 14.3 13.9 15.5 15.6 16.0 15.6 15.1 15.0 10 0  1.7  1.7 000000 1012.0  2.8  0.0  1.3
14 7 33 09 02 97 15.0 64 17.0 12.7 11.9 15.2 15.4 15.9 15.8 15.1 14.9 10 0 tr    2.8 000000 1012.0  0.0  0.0  2.0
15 7 32 09 02 97 15.2 66 18.9  8.8  7.0 13.6 13.8 14.8 15.4 15.2 14.9 10 0 tr    5.5 000000 1016.0  0.0  0.0  2.1
16 7 36 05 02 97 14.1 66 19.4  8.7  7.1 13.3 13.6 15.0 15.3 15.1 14.9 10 0  0.0 12.0 000000 1020.5  0.0  0.0  2.3
17 3 00 00 02 97 17.3 62 22.3  7.8  6.1 13.3 13.9 15.2 15.5 15.1 14.8 10 0  0.0 11.2 000000 1020.5  0.0  0.0  2.8
18 3 32 02 02 97 21.3 61 25.4  9.2  7.2 13.9 14.2 15.4 15.9 15.3 14.8 00 0  0.0  9.7 000000 1021.0  0.0  0.0  2.6
19 0 33 02 02 97 21.0 61 25.0 11.7  9.7 15.5 15.9 16.8 16.5 15.7 14.9 00 0  0.0 13.5 000000 1021.5  0.0  0.0  3.2
20 4 00 00 02 97 22.6 70 25.3 13.0 11.5 16.2 16.6 17.5 17.1 16.1 14.9 00 0  0.0  9.8 000000 1023.0  0.0  0.0  3.1
21 0 05 02 02 97 22.0 67 26.0 13.2 11.1 16.7 17.1 17.9 17.5 16.5 15.1 00 0  0.0 14.7 000000 1026.0  0.0  0.0  3.5
22 8 09 09 02 97 15.4 73 21.4 12.7 12.7 17.1 17.5 18.3 17.8 16.8 15.3 00 0 tr    9.0 000000 1023.5  0.0  0.0  2.7
23 8 09 13 60 96 15.0 82 19.0 12.9 12.9 16.6 16.7 17.6 17.6 16.9 15.5 00 0 tr    2.0 000000 1017.5  0.0  0.0  1.8
24 8 09 09 20 97 13.9 85 16.9 12.9 12.7 16.1 16.6 17.4 17.1 16.7 15.6 00 0 tr    0.0 000000 1011.0  0.0  0.0  1.3
25 8 03 02 02 97 16.5 76 19.4 12.7  9.9 15.6 15.7 16.6 16.6 16.3 15.6 00 0  0.0  0.1 000000 1009.0  0.0  0.0  1.2
26 7 22 02 02 97 19.4 71 22.9 13.2 10.0 16.1 16.2 16.7 16.5 16.1 15.5 00 0  0.0  5.7 000000 1010.0  0.0  0.0  2.3
27 6 22 02 02 97 20.4 58 23.9 14.1 12.1 16.4 16.6 17.2 16.9 16.3 15.4 00 0  0.0  8.7 000000 1014.0  0.0  0.0  2.5
28 8 22 02 03 97 19.3 74 20.5 14.3 11.7 17.2 17.2 17.9 17.4 16.6 15.4 00 0  6.9  2.9 000100 1014.5  1.5  0.0  1.5
29 3 25 02 02 97 20.1 71 24.4 13.2 11.5 17.0 17.1 17.5 17.4 16.8 15.6 10 0  1.5  7.5 000100 1016.5  0.3  0.0  2.5
30 5 24 05 03 97 20.5 82 25.0 12.1  9.8 17.0 16.9 17.6 17.7 17.0 15.7 10 0  0.0  9.3 000000 1021.5  0.0  0.0  1.9
31 5 22 05 02 97 19.9 70 25.2 14.0 11.4 17.2 17.7 18.4 18.0 17.2 15.8 10 0  0.0 10.9 000000 1022.0  0.0  0.0  3.1
-----------------------------------------------------------------------------------------------------------------
Mean
    6.2 4.4      17.3 75 20.9 12.2 10.7 15.7 15.9 16.7 16.6 16.0 15.2                       1014.8
Total                                                                      68.8 160.3               35.2 0.0 59.2
1961-1990 Climatological
Mean5.2 5.5           73 22.1 12.5 10.8 16.0 16.4 17.3 17.3 16.3 15.1      46.7 191.2       1017.5 35
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  0.0;             50% snow cover at 09h     days  0; mean  0.0;
Hail                      days  0; mean  0.1;             Ice pellets               days  0; mean  0.0;
Thunder                   days  3; mean  1.9;             Fog at 09h                days  0; mean  0.1;
Gale                      days  0; mean  0.0;
Air frost                 days  0; mean  0.0              Days with 0.2mm rain      days 10; mean 10.9*
Grass minimum frost       days  0; mean  0.0              Days with 1.0mm rain      days  8; mean  7.6*
Soil frost                days  0                         Days with 5.0mm rain      days  5; mean  2.8*
Concrete frost            days  0                         Days with no sun          days  2; mean  1.7

Relative humidity: min - 35%/17th; Air pressure: max - 1026.0mb/21st, min - 993.0mb/10th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 20 recent drizzle, 21 recent rain,
          60 intermittent light rain, 61 continuous light rain);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 90 cracked);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;
     G    gale;                    F    fog at 09GMT;
* Averages for Hurley (4km away)
Coolest July since 1988; a dull month due to a very dull first 10 days. 993mb on the 10th was very low for July.
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August 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR AUGUST 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 7 20 02 02 97 19.0 72 24.9 13.5 10.6 12.3 17.7 18.5 18.2 17.4 15.9 10 0  0.0  7.5 000000 1017.5  0.0  0.0  2.8
02 6 22 09 03 97 18.6 64 23.2 12.1  9.3 16.9 17.3 18.3 18.3 17.6 16.1 10 0  6.2  7.8 000100 1014.0  1.8  0.0  1.8
03 7 20 02 02 97 17.8 68 19.9 14.2 12.7 17.4 17.5 18.1 18.1 17.5 16.2 10 0  8.2  2.5 000100 1013.5  2.5  0.0  0.8
04 7 27 05 02 97 16.7 73 22.3 14.0 11.7 17.1 17.2 17.8 17.8 17.3 16.2 10 0  0.0  9.2 000000 1023.5  0.0  0.0  2.1
05 3 21 02 03 97 18.0 64 24.0 11.0  8.9 16.2 16.4 17.5 17.8 17.4 16.2 10 0  0.0 10.5 000000 1025.5  0.0  0.0  2.2
06 7 25 05 02 97 22.6 78 24.9 16.1 13.5 18.3 18.1 18.3 17.8 17.3 16.2 00 0  0.0  3.5 000000 1024.5  0.0  0.0  2.1
07 8 00 00 02 97 20.1 77 23.1 17.0 13.5 17.7 17.9 18.4 18.0 17.3 16.2 00 0  0.1  0.3 000000 1024.5  0.1  0.0  1.5
08 8 22 02 02 97 19.3 77 23.9 15.9 13.5 18.1 18.2 18.5 18.1 17.5 16.3 00 0 tr    2.2 000000 1021.0  0.0  0.0  1.5
09 9 00 00 45 03 17.0 88 23.8 13.0 10.5 16.9 17.3 18.0 18.0 17.5 16.4 00 0  0.0  3.0 000000 1019.5  0.0  0.0  2.5
10 8 27 05 02 97 19.1 78 25.0 17.0 14.0 18.0 18.2 18.4 18.0 17.4 16.4 00 0  0.0  5.7 000000 1016.0  0.0  0.0  2.0
11 7 22 02 03 97 19.0 64 24.5 14.6 11.4 17.5 17.8 18.3 18.0 17.6 16.4 00 0  0.0  8.1 000000 1016.5  0.0  0.0  2.7
12 0 18 02 02 97 18.6 60 27.0 11.9 10.1 16.6 16.9 17.9 18.7 17.7 16.5 00 0  0.0 12.5 000000 1014.0  0.0  0.0  3.2
13 8 22 05 03 97 19.6 84 23.6 14.2 12.0 17.8 18.0 18.6 18.4 17.9 16.5 00 0  5.0  1.8 000000 1014.5  3.0  0.0  1.3
14 8 25 02 02 97 19.6 84 23.0 16.5 14.0 18.3 18.4 18.9 18.5 17.9 16.6 10 0  0.0  1.4 000000 1015.0  0.0  0.0  2.1
15 6 22 05 02 97 19.1 60 22.8 13.3  9.6 17.4 18.0 18.8 18.5 17.8 16.7 10 0  1.8  8.0 000000 1021.0  1.0  0.0  3.0
16 7 22 02 02 97 17.1 68 22.8 13.8 12.6 17.5 18.0 18.5 18.4 17.8 16.7 10 0  0.0  7.5 000000 1016.0  0.0  0.0  0.8
17 1 22 09 02 97 17.5 59 22.9 13.7 12.7 17.0 18.0 18.0 18.0 17.7 16.6 00 0  0.1  8.0 000000 1012.5  0.2  0.0  0.6
18 6 18 02 02 97 16.9 93 18.8 12.0 10.3 17.0 17.0 17.5 17.5 17.6 16.6 00 0  2.7  0.1 000000 1012.5  1.5  0.0  1.6
19 5 18 05 02 97 16.5 72 23.6 13.4 11.0 17.5 17.5 17.5 17.2 17.3 16.7 10 0  0.0  9.5 000000 1010.5  0.0  0.0  2.6
20 6 32 02 02 97 17.9 56 22.4 11.2  8.3 18.0 17.5 17.0 17.2 17.4 16.7 00 0  0.0  5.0 000000 1014.0  0.0  0.0  2.5
21 1 22 02 02 97 16.7 63 22.7  8.2  6.0 16.0 16.0 17.0 16.9 17.4 16.7 00 0  0.0  7.5 000000 1015.5  0.0  0.0  2.6
22 5 36 02 02 97 17.6 63 22.1  8.9  7.0 16.0 16.5 17.5 16.8 17.3 16.7 00 0  0.0  9.5 000000 1020.0  0.0  0.0  2.4
23 1 05 05 02 97 18.9 59 23.7 12.4 10.0 17.0 17.0 18.0 17.1 17.1 16.6 00 0  0.0 12.0 000000 1023.5  0.0  0.0  3.0
24 1 05 02 05 96 19.5 68 26.3 11.9  9.5 17.5 17.5 18.0 17.2 17.0 16.5 00 0  0.0 11.5 000000 1024.0  0.0  0.0  1.2
25 5 09 05 02 97 21.6 47 26.5 13.8 12.0 18.0 18.5 19.0 17.7 17.2 16.4 00 0  3.2 10.0 000100 1020.5  2.2  0.0  1.0
26 7 22 02 03 97 18.9 73 19.6 17.2 14.0 17.5 18.0 19.0 18.0 17.4 16.4 10 0  3.7  0.5 000000 1010.5  4.7  0.0  2.6
27 6 22 05 03 95 15.8 88 22.0 12.5  8.0 16.0 16.0 17.5 17.1 17.1 16.3 10 0  8.6  4.0 000100 1013.5  1.2  0.0  2.1
28 7 22 09 03 97 16.7 68 21.2 10.8  9.0 16.0 16.0 18.0 17.2 17.1 16.5 10 0  0.0  6.5 000000 1018.5  0.0  0.0  2.4
29 5 00 00 03 97 16.5 76 22.1  8.8  6.2 15.0 15.5 16.0 16.9 17.0 16.6 10 0  0.0  7.5 000000 1021.0  0.0  0.0  2.3
30 2 09 02 02 97 16.8 70 21.5 12.6  9.9 15.3 15.6 16.8 17.1 16.9 16.6 10 0  0.0 11.7 000000 1020.5  0.0  0.0  2.3
31 7 18 02 03 97 15.9 72 21.8  9.1  7.2 14.3 14.8 16.0 16.9 16.9 16.5 10 0  2.1  6.0 000000 1013.5  1.8  0.0  1.8
-----------------------------------------------------------------------------------------------------------------
Mean
    5.4 3.4      18.2 70 23.1 13.1 10.6 16.8 17.2 17.9 17.7 17.4 16.4                       1017.6
Total                                                                      41.7 200.8              20.0  0.0 63.4
1961-1990 Climatological
Mean5.2 5.3           77 21.7 12.2 10.5 15.6 16.2 17.2 17.2 17.0 16.1      57.5 180.9       1016.4 39
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  0.0;             50% snow cover at 09h     days  0; mean  0.0;
Hail                      days  0; mean  0.0;             Ice pellets               days  0; mean  0.1;
Thunder                   days  4; mean  1.5;             Fog at 09h                days  0; mean  0.4;
Gale                      days  0; mean  0.0;
Air frost                 days  0; mean  0.0              Days with 0.2mm rain      days  9; mean 12.4*
Grass minimum frost       days  0; mean  0.0              Days with 1.0mm rain      days  9; mean  8.6*
Soil frost                days  0                         Days with 5.0mm rain      days  4; mean  3.4*
Concrete frost            days  0                         Days with no sun          days  0; mean  2.2
Air pressure: max - 1025.5mb/5th, min - 1004.0mb/31st

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 05 haze,
                   45 fog);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 90 cracked);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;    F    fog at 09GMT;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;   G    gale;
* Averages for Hurley (4km away)

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September 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR SEPTEMBER 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 7 20 02 02 97 15.7 80 18.0 12.8 10.1 15.6 15.9 16.5 17.0 16.8 16.4 10 0  2.5  2.5 000000 1003.0  3.1  0.0  0.8
02 3 27 02 02 97 15.4 75 21.0 10.9  8.2 15.0 15.2 15.5 16.7 16.6 16.3 10 0  0.2  4.5 000000 1008.0  0.2  0.0  1.0
03 2 18 02 02 97 13.7 64 17.8  8.9  6.1 14.0 14.0 14.7 16.6 16.4 16.3 10 0  0.0 11.0 000000 1020.0  0.0  0.0  1.8
04 0 32 02 02 97 14.1 62 20.0  5.5  3.2 12.2 12.9 14.7 16.0 16.3 16.2 10 0  0.0  9.5 000000 1025.0  0.0  0.0  1.7
05 7 22 02 03 97 16.5 76 19.7  9.7  7.2 13.3 13.3 14.9 15.8 16.1 16.1 10 0  0.6  0.8 000000 1022.0  0.5  0.0  1.2
06 8 21 02 02 96 17.0 74 19.0 13.2 10.1 15.0 15.3 15.8 15.9 15.8 15.9 10 0  1.6  1.0 000000 1010.0  0.5  0.0  1.7
07 8 23 02 03 97 15.0 68 19.0  7.9  5.0 13.2 13.7 14.9 15.6 15.7 15.9 10 0  0.0  0.1 000000 1016.0  0.0  0.0  1.3
08 8 27 02 02 97 17.7 79 18.6 12.6  7.0 16.6 16.4 16.3 15.8 15.7 15.8 10 0  5.2  0.0 000000 1018.0  6.2  0.0  0.2
09 7 24 02 02 96 17.2 81 21.5 14.9 11.5 16.3 16.3 16.5 16.1 15.8 15.7 10 0 tr    4.2 000000 1023.0  0.0  0.0  1.1
10 5 00 00 02 94 19.0 88 24.5 14.5 12.0 16.8 16.8 17.0 16.7 16.3 15.7 10 0  0.0  6.8 000000 1023.0  0.0  0.0  1.2
11 1 00 00 02 96 21.5 71 26.8 13.8 11.8 16.0 16.5 17.4 17.1 16.6 15.8 10 0  0.0 10.0 000000 1016.0  0.0  0.0  2.1
12 8 20 09 02 97 17.7 66 22.9 16.0 12.7 17.2 17.4 17.8 17.4 16.9 15.9 10 0  0.0  6.4 000000 1011.0  0.0  0.0  1.8
13 7 27 02 02 97 17.5 75 20.5 12.6 10.5 15.9 16.3 17.0 17.1 16.9 16.1 10 0  0.0  4.5 000000 1014.0  0.0  0.0  1.3
14 3 27 02 02 97 17.0 77 20.5 11.7 10.0 15.5 15.9 16.8 17.1 16.9 16.1 10 0  3.6  1.8 000000 1014.5  2.3  0.0  1.4
15 7 20 02 02 97 16.8 94 17.5 15.8 12.0 16.7 17.0 17.4 17.1 16.9 16.2 10 0  7.2  0.1 000000 1008.0  4.0  0.0  0.7
16 8 28 09 02 97 14.8 77 18.1 13.2 12.2 15.5 15.7 16.5 16.8 16.7 16.1 10 0  0.0  3.0 000000 1012.0  0.0  0.0  2.0
17 7 18 02 02 97 14.5 78 19.6 11.6  9.9 14.5 14.8 16.3 16.5 16.5 16.1 10 0  0.2  0.5 000000 1013.5  0.2  0.0  1.5
18 8 22 13 02 97 15.2 85 15.4 14.1 11.4 15.1 15.5 16.0 16.2 16.3 16.0 10 0 10.2  0.0 000000 1001.0 13.7  0.0  0.6
19 8 36 05 02 96 14.0 88 14.9 11.7 11.6 14.6 14.8 15.0 15.9 16.1 16.0 10 0 15.7  0.0 000000  999.5  8.3  0.0  0.1
20 1 18 09 02 97 13.7 82 16.7 10.1  7.3 13.1 13.8 14.8 15.5 15.3 15.9 10 0  1.8  5.7 000000 1001.5  0.2  0.0  0.9
21 1 14 05 02 97 12.9 86 18.0  6.3  4.6 12.2 12.2 13.9 14.0 15.2 15.8 10 0  0.7  2.8 000000 1013.0  0.5  0.0  0.6
22 7 23 09 21 97 18.0 73 21.3 12.9 11.0 15.0 14.8 15.0 15.0 15.2 15.6 10 0  0.0  7.8 000000 1017.5  0.0  0.0  1.7
23 3 25 02 02 97 19.5 83 23.7 13.4 10.5 14.9 14.9 15.5 15.5 15.5 15.5 10 0  0.0  8.6 000000 1020.0  0.0  0.0  2.3
24 6 22 02 03 97 15.9 94 15.9 14.2 10.5 14.9 15.2 15.9 15.9 15.7 15.5 10 0  7.1  1.6 000100 1013.5  4.0  0.0  0.1
25 0 27 02 02 97 14.8 77 17.7  8.0  5.5 12.0 12.7 14.3 15.4 15.4 15.5 10 0  6.8  3.8 000000 1020.0  7.9  0.0  0.7
26 8 18 05 02 96 17.7 79 20.3 12.7 11.0 15.1 15.2 15.4 15.4 15.4 15.5 10 0  0.8  2.6 000000 1014.5  0.1  0.0  1.1
27 0 22 05 02 97 16.0 78 17.9  9.3  6.6 13.3 13.6 14.9 15.5 15.4 15.4 10 0 14.1  2.2 000000 1013.0  8.2  0.0  1.1
28 7 25 02 01 96 15.5 91 17.5 11.5  9.2 13.8 14.3 15.0 15.0 15.2 15.4 10 0  0.3  5.0 000000  999.5  0.1  0.0  1.2
29 6 29 02 01 97 16.1 82 18.9 10.2  7.0 13.2 13.7 14.3 15.0 15.1 15.3 10 0  0.9  5.5 000000  998.5  0.1  0.0  0.8
30 0 00 00 10 95 15.5 84 17.9 10.3  7.3 12.2 13.6 14.6 15.0 15.0 15.2 10 0  0.0  5.1 000000 1004.0  0.0  0.0  0.8
-----------------------------------------------------------------------------------------------------------------
Mean
    5.0 3.5      16.2 79 19.4 11.7  9.1 14.6 14.9 15.7 16.0 16.0 15.8                      1012.4
Total                                                                      79.5 117.4              60.1  0.0 34.8
1961-1990 Climatological
Mean5.7 4.4           83 19.2 10.0  7.9 13.2 13.8 15.0 15.5 15.4 15.3      57.7 137.0       1016.8 40
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  0.0;             50% snow cover at 09h     days  0; mean  0.0;
Hail                      days  0; mean  0.0;             Ice pellets               days  0; mean  0.0;
Thunder                   days  1; mean  0.9;             Fog at 09h                days  0; mean  0.6;
Gale                      days  0; mean  0.2;
Air frost                 days  0; mean  0.0              Days with 0.2mm rain      days 18; mean 11.5*
Grass minimum frost       days  0; mean  0.3              Days with 1.0mm rain      days 11; mean  8.7*
Soil frost                days  0                         Days with 5.0mm rain      days  7; mean  3.8*
Concrete frost            days  0                         Days with no sun          days  3; mean  2.9
Air pressure: max - 1025.0mb/4th, min - 993.5mb/19th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (01 cloud decreasing, 02 sky not changing, 03 cloud increasing,
          10 mist, 21 recent rain);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet, 90 cracked);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;    F    fog at 09GMT;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;   G    gale;
* Averages for Hurley (4km away)
Return to top of document


October 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR OCTOBER 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 8 00 00 44 06  9.2 97 18.0  7.0  6.4 12.2 12.4 13.5 14.6 14.8 15.2 10 0  6.9  5.2 000000 1008.0  2.5  0.0  0.8
02 8 27 02 02 96 13.4 86 15.2  9.2  7.0 12.6 12.8 13.9 14.5 14.6 15.1 10 0  0.0  1.6 000000 1004.5  0.0  0.0  1.2
03 8 29 02 02 97 13.7 89 16.0  8.0  6.4 12.3 12.6 13.4 14.2 14.4 15.0 10 0  0.2  0.0 000000 1018.0  0.4  0.0  1.2
04 8 22 13 02 97 13.3 75 16.2 11.7 10.5 13.3 13.5 14.0 14.2 14.2 14.9 10 0 tr    4.6 000000 1020.0  0.0  0.0  1.4
05 8 29 05 02 97 12.9 83 15.5 10.2  6.9 11.6 12.3 13.7 14.3 14.2 14.8 10 0  1.5  7.1 004100 1016.5  0.5  0.0  1.2
06 1 33 02 02 97 10.8 79 14.4  3.8  2.6  9.4 11.1 12.2 13.8 14.1 14.7 10 0  6.8  5.5 000000 1027.0  5.2  0.0  1.0
07 8 22 05 63 95 10.0 92 12.8  9.3  7.9 11.3 11.8 12.7 13.5 13.8 14.6 10 0  6.8  0.0 000000 1022.5  5.0  0.0  0.1
08 1 30 02 02 97 12.1 85 15.9 10.0  6.9 12.2 12.4 12.9 13.2 13.4 14.4 10 0  0.0  6.7 000000 1015.0  0.0  0.0  0.8
09 1 30 13 02 97  7.6 98 12.1  4.2  0.9  9.4 10.1 11.8 13.1 13.4 14.2 10 0 15.5  0.0 000000 1008.0  9.8  0.0  0.3
10 7 27 02 80 97  8.3 87 12.8  6.1  3.1  9.4 10.0 11.4 12.6 12.9 14.1 10 0  9.1  5.0 000000  988.5  3.4  0.0  1.1
11 8 28 13 02 97  7.3 89 13.5  5.8  2.4  9.6  9.9 10.9 12.1 12.6 13.9 10 0  2.8  3.2 000000  975.0  0.7  0.0  1.2
12 8 00 00 41 94  9.4 96 13.7  7.3  4.5 10.0 10.3 11.2 12.1 12.3 13.6 10 0  0.0  4.4 000000  988.5  0.0  0.0  0.4
13 7 35 02 41 94  9.4 97 15.4  5.8  2.6  9.9 10.1 11.1 12.0 12.2 13.5 10 0  0.1  4.5 000000 1008.5  0.2  0.0  0.5
14 8 27 02 60 97 10.8 94 13.8  7.9  3.5 10.4 10.6 11.1 11.9 12.1 13.4 10 0 tr    1.0 000000 1016.0  0.0  0.0  0.7
15 8 22 02 02 97 11.2 90 15.5 10.7  9.4 11.6 11.7 12.0 12.2 12.2 13.2 10 0  3.5  4.1 000000 1014.5  8.0  0.0  0.8
16 8 21 02 61 96 11.6 96 13.8 11.0  8.5 11.7 11.9 12.4 12.6 12.5 13.1 10 0  0.2  0.7 000000 1005.0  0.2  0.0  0.6
17 0 00 00 02 97  6.6 87 14.3  4.3  1.6  8.8  9.4 11.1 12.2 12.3 13.1 10 0  5.9  6.7 000000 1023.0  5.3  0.0  1.3
18 8 25 09 21 96 14.1 96 15.9  6.6  8.1 11.7 11.7 12.0 12.1 12.2 13.1 10 0  0.0  0.1 000000 1015.0  0.0  0.0  0.6
19 0 00 00 02 94  9.0 99 14.6  5.4  2.5  9.9 10.5 11.8 12.4 12.3 13.0 10 0  0.0  8.9 000000 1019.0  0.0  0.0  0.8
20 7 23 02 02 96  9.0 95 13.6  6.9  2.8  9.0  9.6 10.8 12.0 12.3 13.0 10 0 18.4  0.1 000000 1015.0 13.2  0.0  0.4
21 8 30 05 02 95 10.6 96 11.1  9.0  7.8 11.1 11.3 11.6 11.9 12.0 13.0 10 0  0.5  0.0 000000 1017.0  0.4  0.0  0.3
22 8 00 00 60 95 10.7 96 13.5  9.8  9.1 11.1 11.1 11.7 11.9 12.1 12.9 10 0  1.3  1.5 000000 1024.5  1.0  0.0  0.2
23 8 20 05 60 96 13.5 96 15.7  6.7  3.6 11.1 10.9 11.1 11.8 11.9 12.8 10 0  1.3  2.4 000000 1015.5  0.5  0.0  0.8
24 6 27 05 02 97 11.4 89 13.4  9.6  7.0 10.3 10.6 11.4 11.9 11.9 12.7 10 0  0.7  0.0 000000 1019.5  0.3  0.0  1.1
25 7 22 13 02 97 13.0 83 15.5 11.4 10.0 11.7 11.6 11.8 11.9 11.9 12.7 10 0 tr    2.0 000000 1007.0  0.0  0.0  1.4
26 1 34 02 02 97  8.8 83 14.0  6.3  2.1  9.2  9.9 11.0 11.9 12.0 12.6 10 0  2.8  4.4 000000 1016.5  4.6  0.0  1.1
27 8 23 13 02 97 12.9 85 14.9  8.8  7.5 11.1 11.0 11.4 11.7 11.8 12.6 10 0  7.2  0.0 000000 1012.0  2.8  0.0  0.5
28 8 23 09 63 95 14.8 96 15.7 11.8  9.6 11.8 11.8 12.0 11.9 11.8 12.5 10 0 12.5  0.0 000000 1007.0  2.2  0.0  1.4
29 6 22 13 03 97  9.3 74 13.0  7.6  4.9  9.5  9.9 11.0 11.9 11.9 12.5 10 0 49.8  5.2 000000 1005.0 16.1  0.0  1.3
30 8 27 19 21 97  8.4 85 10.6  8.4  7.5 11.4 11.4 11.7 11.9 11.8 12.5 20 0  3.7  2.1 000000  978.5  2.0  0.0  1.6
31 7 25 09 02 97 10.5 85 13.0  6.4  5.0  9.5  9.9 10.5 11.2 11.6 12.4 10 0 tr    5.7 000000  990.5  0.0  0.0  1.6
-----------------------------------------------------------------------------------------------------------------
Mean
    6.3 5.5      10.8 90 14.3  8.0  5.8  7.1 10.8 11.9 12.6 12.7 13.5                       1009.7
Total                                                                     157.5  92.7              84.3  0.0 27.7
1961-1990 Climatological
Mean5.4 5.1           88 15.3  7.5  5.3 10.1 10.8 11.7 12.4 12.6 13.2      60.4  97.0       1015.7 46
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  0.0;             50% snow cover at 09h     days  0; mean  0.0;
Hail                      days  0; mean  0.0;             Ice pellets               days  1; mean  0.1;
Thunder                   days  1; mean  0.3;             Fog at 09h                days  0; mean  2.9;
Gale                      days  0; mean  0.3;
Air frost                 days  0; mean  0.6              Days with 0.2mm rain      days 21; mean 14.3*
Grass minimum frost       days  0; mean  3.9              Days with 1.0mm rain      days 17; mean 10.0*
Soil frost                days  0                         Days with 5.0mm rain      days 10; mean  3.8*
Concrete frost            days  0                         Days with no sun          days  7; mean  6.8

Air pressure: max - 1027.5mb/6th, min - 967.5mb/11th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 21 recent rain, 41 fog patches,
          44 fog, 60 intermittent light rain, 61 continuous light rain, 63 continuous moderate rain);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evapoartion (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;    F    fog at 09GMT;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;   G    gale;
* Averages for Hurley (4km away)
Wettest October since 1987. Frequent low pressure, and stormy during 29th-30th.
Return to top of document


November 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR NOVEMBER 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 2 23 13 02 97  9.2 72 11.0  7.1  3.9  8.8  9.2 10.0 11.0 11.2 12.3 10 0  9.6  6.1 000000  995.0  2.4  0.0  1.1
02 8 22 05 60 96  8.0 94 10.3  2.7  1.2  8.1  8.2  9.2 10.9 10.9 12.1 10 0  8.1  2.2 000000  986.5  2.0  0.0  1.4
03 7 25 02 02 97  7.0 90 11.5  3.9  0.5  7.2  7.4  8.7 10.0 10.5 12.0 10 0  0.0  4.1 000000  994.0  0.0  0.0  0.6
04 2 29 02 03 97  4.2 96 12.0  0.2 -1.7  6.1  6.4  7.6  9.5 10.3 11.8 10 0  0.2  6.6 000000 1007.0  0.3  0.0  0.6
05 8 24 02 02 96  6.6 98 10.4  1.7 -0.5  6.6  6.7  7.8  9.2  9.8 11.6 10 0 26.0  1.2 000000 1005.5 13.6  0.0  0.7
06 7 32 05 02 97  8.0 91 10.3  6.2  1.7  7.8  8.0  8.8  9.4  9.6 11.3 10 0 10.6  0.8 000000  974.5  5.2  0.0  0.2
07 8 36 05 80 97  8.5 90 10.6  7.8  4.8  8.8  8.7  9.1  9.6  9.7 11.1 20 0  0.3  1.2 000000  978.0  1.0  0.0  0.7
08 7 36 05 02 97  6.8 91  9.2  6.2  2.6  8.0  8.2  8.9  9.5  9.6 11.0 10 0 tr    0.0 000000  989.5  0.0  0.0  0.6
09 8 33 05 02 97  7.5 88 10.3  5.6  2.3  7.7  7.7  8.5  9.3  9.6 11.0 10 0  0.0  0.9 000000 1003.5  0.0  0.0  0.8
10 0 36 02 02 97  2.7 96 11.5  2.5 -1.1  6.3  6.7  7.9  9.1  9.4 10.9 10 0  1.3  4.6 000000 1016.0  2.7  0.0  1.0
11 8 22 05 02 97 11.5 89 12.2  2.7  7.0  9.2  8.9  8.9  9.1  9.4 10.8 10 0 11.9  0.0 000000 1009.5  8.0  0.0  0.8
12 3 32 02 02 97  7.3 89 11.1  7.3  4.6  8.2  8.3  9.0  9.4  9.4 10.7 10 0  0.0  6.4 000000  997.0  0.0  0.0  0.6
13 0 00 00 11 94  0.0 95 10.3 -0.2 -2.2  5.1  5.7  7.3  9.0  9.4 10.6 10 0  0.1  7.4 000000  999.5  0.2  0.5  0.6
14 3 00 00 11 94  1.0 99  7.0  0.0 -2.2  4.9  5.3  6.8  8.3  9.0 10.6 10 0 tr    3.7 000001 1004.0  0.0  0.0  0.1
15 9 00 00 45 03  1.5 98 10.0 -1.0 -3.1  4.4  4.5  6.0  7.9  8.3 10.4 10 0  7.5  0.0 000001 1010.5 10.0  7.5  0.3
16 8 23 05 61 96  8.7 94 10.5  1.5  5.0  7.7  7.5  7.4  7.8  8.2 10.1 10 0  0.0  4.7 000000 1002.0  0.0  0.0  0.5
17 7 36 02 03 97  2.4 93  8.4 -0.3 -3.9  4.1  4.4  6.1  7.7  8.3 10.0 10 0 tr    3.0 000000 1012.0  0.0  0.4  0.6
18 7 32 02 03 97  6.9 94 11.4  1.6 -1.2  5.4  5.2  6.2  7.5  8.0  9.9 10 0  3.4  0.1 000000 1011.5  2.8  0.0  0.4
19 8 29 05 02 97  9.5 85 12.0  6.9  6.5  8.1  7.9  8.0  8.0  8.0  9.7 10 0  4.3  1.6 000000  997.0  1.6  0.0  0.5
20 1 00 00 02 96  2.2 92  6.2  0.7 -3.0  4.8  5.3  6.8  8.0  8.3  9.6 10 0 tr    0.9 000000  998.0  0.0  0.0  0.2
21 8 19 02 02 97  4.3 97  9.3  1.9 -2.0  5.7  5.8  6.5  7.5  8.0  9.6 10 0  4.2  0.0 000000  999.0  5.0  0.0  1.0
22 3 27 13 02 97  9.2 78 10.6  4.3  3.6  6.1  6.0  6.8  7.5  7.8  9.5 10 0 tr    3.0 000000  993.0  0.0  0.0  1.5
23 8 21 02 02 97  6.4 92  9.2  1.9 -1.7  5.3  5.3  6.4  7.4  7.8  9.4 10 0  2.2  0.0 000000  999.5  3.6  0.0  0.1
24 1 00 00 11 94  4.3 94 10.3  1.0 -2.6  4.5  4.9  6.5  7.4  7.7  9.4 10 0  2.2  1.8 000000 1007.5  1.5  0.0  0.8
25 8 22 05 02 97 10.3 91 11.1  4.3  4.0  6.7  6.6  7.1  7.6  7.7  9.1 10 0  4.8  0.0 000000  999.0  3.9  0.0  1.1
26 6 25 05 02 97  8.3 78 10.7  6.7  3.9  6.8  6.8  7.1  7.6  7.7  9.2 10 0  0.0  4.5 000000  995.0  0.0  0.0  1.0
27 8 27 02 02 96  6.6 96 14.0  1.7 -1.5  5.1  5.2  6.4  7.5  7.8  9.1 10 0 11.3  0.0 000000 1011.5  5.3  0.0  0.9
28 8 21 09 02 97 13.9 90 14.9  6.0  1.3  9.2  9.1  8.6  8.1  7.8  9.1 10 0  1.1  0.0 000000 1008.0  2.0  0.0  0.8
29 8 22 05 62 97 11.9 90 13.6  9.9  4.0  8.4  8.3  8.7  8.7  8.3  9.1 10 0  0.5  0.0 000000 1002.0  0.7  0.0  0.9
30 3 00 00 01 94  7.5 97 12.1  4.3  0.2  6.7  7.2  7.3  7.3  8.6  9.2 10 0 10.7  0.1 000000 1012.5  6.8  0.0  0.9
-----------------------------------------------------------------------------------------------------------------
Mean
   5.6  3.7       6.7 91 10.7  3.5  1.0  6.7  6.8  7.7  8.6  8.9 10.3                       1000.6
Total                                                                     120.3 64.9               78.6  8.4 21.3
Climatological
Mean5.6  5.5          89 10.4  3.8  1.7  6.1  6.7  7.7  8.6  9.2 10.6      62.3 60.4       1014.6 53
-----------------------------------------------------------------------------------------------------------------
Snow                      days  0; mean  0.6;             50% snow cover at 09h     days  0; mean  0.1;
Hail                      days  0; mean  0.1;             Ice pellets               days  0; mean  0.1;
Thunder                   days  0; mean  0.2;             Fog at 09h                days  2; mean  3.4;
Gale                      days  0; mean  0.2;
Air frost                 days  3; mean  5.6              Days with 0.2mm rain      days 19; mean 15.0*
Grass minimum frost       days 13; mean 11.1              Days with 1.0mm rain      days 16; mean 10.6*
Soil frost                days 10                         Days with 5.0mm rain      days  8; mean  4.4*
                                                          Days with no sun          days  9; mean 10.3

Air pressure: max - 1016.5mb/10th, min - 973.0mb/6th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 11 shallow fog patches, 45 fog,
      60 intermittent light rain, 61 continuous light rain, 62 intermittent moderate rain, 80 light rain shower);
09GMT observations...
     Temp temperature (degC);      RH   relative humidity (%);   SS snow depth (cm);
     Press   air pressure (mb); E    state of ground (00 dry, 10 moist, 20 wet);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;    F    fog at 09GMT;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;   G    gale;
* Averages for Hurley (4km away)
A very wet month, and a very cyclonic one, with unusually low mean air pressure.
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December 2000

                        MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR DECEMBER 2000

                 -09GMT- --Temperature- --Soil temps-- -Earth temps--                              Rain  Fr. Pch
DD N dd ff ww VV Temp RH  Max  Min Gmin  5cm 10cm 20cm 30cm 50cm   1m E SS Rain  Sun SLHTGF  Press  hrs  hrs Evap
-----------------------------------------------------------------------------------------------------------------
01 8 23 05 02 95 12.1 91 13.5  7.5  8.4  9.5  9.3  8.7  9.0  8.7  9.4 20 0  1.9  0.0 000000 1001.5  1.8  0.0  0.7
02 6 22 09 02 97  9.6 88 12.1  9.4  4.0  8.3  8.4  9.1  9.2  9.0  9.5 10 0  0.1  1.8 000000 1009.0  0.1  0.0  0.6
03 1 31 02 10 94  2.7 96 11.2  1.6 -1.1  5.5  5.9  7.4  8.8  8.9  9.6 10 0  7.3  4.4 000000 1015.5  5.8  0.0  1.4
04 8 21 05 61 95 11.2 96 13.7  2.7  5.0  8.4  8.2  7.2  8.1  8.6  9.6 10 0  2.0  1.1 000000 1000.5  2.0  0.0  1.0
05 8 26 09 02 97 12.4 82 12.4 11.2  8.9  9.4  9.2  9.3  9.0  8.8  9.5 10 0  8.5  0.0 000000 1002.5  6.3  0.0  1.0
06 2 22 02 02 97 10.0 87 12.3 10.0  6.5  8.4  8.6  9.5  9.4  9.0  9.5 10 0  0.0  0.2 000000 1004.5  0.0  0.0  1.0
07 8 20 02 10 95  7.8 96 13.1  5.4  1.9  7.3  7.6  8.6  9.3  9.1  9.6 10 0 14.0  0.0 000000 1003.0  8.0  0.0  1.4
08 8 22 13 60 97 10.9 77 12.5  7.8  8.5  9.4  9.4  9.6  9.2  9.1  9.7 10 0  0.3  4.7 000000  993.0  0.3  0.0  1.4
09 1 33 09 02 97  9.2 88 11.1  7.0  3.7  7.7  7.8  8.6  9.2  9.2  9.8 10 0  3.9  1.7 000000 1004.5  2.8  0.0  0.7
10 8 25 05 02 97 10.5 85 13.2  9.2  5.0  8.4  8.3  8.7  9.0  9.0  9.8 10 0  8.4  0.3 000000 1002.0  3.4  0.0  1.1
11 8 22 13 02 97 12.9 80 13.9  9.1  5.0  9.4  9.2  9.1  9.1  9.1  9.7 10 0  4.3  0.1 000000 1013.5  6.1  0.0  0.9
12 8 23 13 02 97 13.3 87 13.3 12.6 11.2 10.9 10.7 10.5  9.7  9.2  9.7 10 0 11.9  0.0 000000 1010.5  8.8  0.0  1.7
13 2 25 09 02 97 10.2 74 11.7  9.8  6.1  9.1  9.3 10.0 10.0  9.6  9.8 10 0  0.5  2.8 000000 1006.5  0.3  0.0  1.7
14 2 31 05 02 97  4.4 94  9.4  3.2 -1.5  6.4  7.0  7.4  9.5  9.6  9.9 10 0  0.6  5.2 000000 1005.5  1.0  0.0  0.6
15 0 33 02 02 97  3.2 97  6.5  2.3 -2.5  5.5  5.9  7.3  8.7  9.0  9.9 10 0  0.0  5.8 000000 1010.0  0.0  0.0  0.3
16 5 32 02 03 97 -0.3 96  3.8 -2.1 -5.9  3.8  4.3  5.6  7.7  8.3  9.8 10 0  0.0  0.0 000000 1014.5  0.0  5.0  0.4
17 8 00 00 02 96  3.5 94  5.9 -0.3 -2.0  5.1  4.9  5.8  7.1  7.7  9.4 10 0  0.4  0.0 000000 1015.0  0.7  0.5  0.1
18 8 27 02 02 96  5.9 96  7.7  3.5  0.0  4.9  4.9  5.9  7.0  7.6  9.3 10 0  2.9  0.0 000000 1014.5  3.1  0.0  0.2
19 8 22 02 10 94  7.7 99  9.7  5.9  6.0  6.4  6.2  6.9  7.2  7.5  9.0 10 0  0.3  0.0 000001 1018.0  0.4  0.0  0.3
20 8 15 09 02 97  9.7 93  9.8  7.7  6.5  7.9  7.6  7.8  7.7  7.7  8.9 10 0 tr    0.0 000000 1014.5  0.0  0.0  0.6
21 8 14 05 02 97  6.7 92  6.9  6.7  5.4  7.3  7.3  7.9  7.9  7.9  8.9 10 0 tr    0.0 000000 1017.5  0.0  0.0  0.4
22 8 13 02 02 95  5.5 95  6.1  3.5 -0.3  6.2  6.2  7.0  7.8  7.8  9.0 10 0  0.0  0.0 000000 1017.0  0.0  0.0  0.3
23 8 13 02 02 96  4.4 95  6.5  3.1  3.1  6.1  6.1  6.9  7.6  7.7  8.9 10 0  1.9  0.0 000000 1012.5  4.5  0.0  0.4
24 8 09 02 61 95  6.5 97  6.5  4.4  3.9  6.7  6.5  6.9  7.5  7.6  8.7 10 0  5.3  0.0 000000 1003.0 17.0  0.0  0.4
25 8 05 09 21 97  3.9 85  4.3  3.9  2.9  5.3  5.4  6.4  7.3  7.4  8.8 10 0  0.0  0.5 000000 1001.0  0.0  0.0  1.7
26 6 04 09 02 97  1.1 71  2.4  0.9 -1.5  2.3  2.8  4.6  6.5  7.1  8.6 10 0  0.0  0.0 000000  996.5  0.0  0.0  1.6
27 8 01 05 02 97  1.5 72  2.8  0.2 -0.5  2.9  2.6  4.0  5.7  6.4  8.3 10 0  3.8  0.0 000000  995.0  0.0  2.4  0.5
28 5 22 05 22 97 -1.3 95  2.0 -2.6 -5.0  2.0  2.0  3.4  5.0  6.0  8.2 03 5  0.0  2.5 510000  997.0  2.0 17.9  0.7
29 3 00 00 10 94 -5.0 98  0.4 -7.5 -8.5  1.4  1.5  2.9  4.5  6.6  7.8 03 5  0.0  2.5 010000 1002.0  0.0 21.1  0.6
30 7 27 09 03 97 -2.1 89  2.6 -5.7-10.0  1.1  1.1  2.4  4.0  6.0  7.6 03 4  0.0  6.3 010000 1007.5  0.0 17.0  0.8
31 7 24 02 03 97 -3.2 98  9.2 -6.6-10.4  1.0  1.1  2.0  3.6  4.4  7.3 02 4 13.1  0.0 010000 1013.0  8.6 11.0  1.1
-----------------------------------------------------------------------------------------------------------------
Mean
   6.2  5.4       6.0 90  8.6  4.0  1.7  6.3  6.3  7.0  7.8  8.1  9.1                       1007.1
Total                                                                      91.4 39.9               83.0 74.9 25.6
Climatological Mean
   6.0  5.7           89  7.8  2.0  0.0  4.3  4.5  5.3  6.0  6.7  8.1      64.0 39.7       1015.0  59
-----------------------------------------------------------------------------------------------------------------
Snow                      days  1; mean  1.9;             50% snow cover at 09h     days  1; mean  1.5;
Hail                      days  0; mean  0.1;             Ice pellets               days  0; mean  0.3;
Thunder                   days  0; mean  0.2;             Fog at 09h                days  1; mean  2.2;
Gale                      days  0; mean  0.2;
Air frost                 days  6; mean  8.8              Days with 0.2mm rain      days 19; mean 16.2*
Grass minimum frost       days 12; mean 15.9              Days with 1.0mm rain      days 14; mean 11.2*
Soil frost                days  8                         Days with 5.0mm rain      days  7; mean  5.2*
                                                          Days with no sun          days 16; mean 15.0

Air pressure: max - 1018/5mb/21st, min - 981.0mb/25th

Key
DD: date
07GMT observations...
     N    cloud cover (oktas, 9=obscured);    dd      wind direction (degrees/10);       ff   wind speed (knots);
     VV   visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good);
     Soil temperatures are for 07GMT beneath a bare soil surface (degC);
     Earth temperatures are for 07GMT beneath a grass surface (degC); SS  snow depth (cm)
     ww   present weather code (02 sky not changing, 03 cloud increasing, 10 mist, 21 recent rain,
          22 recent snow, 60 continuous light rain, 61 continuous light rain)
09GMT observations...
     Temp temperature (degC);  RH relative humidity (%); SS snow depth (cm); Press   air pressure (mb);
     E    state of ground (10  moist, 20 wet, 40 frozen, 01,02,03 snow lying);
24 hour readings...
     Max  maximum temperature (degC) beginning 09GMT,    Min  minimum temperature (degC) ending 09GMT;
     Gmin grass minimum temperature (degC) ending 09GMT; Pch Evap  Piche evaporation (ml) beginning O9GMT;
     Rain rainfall beginning 09GMT (mm);     Sun  sunshine (hours) sunrise-sunset;
     Rain hrs  hours of rainfall (>0.1mm/hr) 09-09GMT;      Fr. hrs   hours of air frost (00-24GMT)
Days with...
     S    snow/sleet falling;      L    50% snow cover at 09GMT;      H>4  hail falling;    F    fog at 09GMT;
     H<5  ice pellets, snow grains, snow pellets falling;             T    thunder heard;   G    gale;
* Averages for Hurley (4km away)

A month of two halves. 12.6C on the 12th was the warmest December night since 1985, then
-7.5C on the 29th was the coldest night since 1991.
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Annual 2000

 
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Last updated 9 January 2001. This page is maintained by brugge@met.reading.ac.uk
© 2000 Roger Brugge