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)Return to top of document
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)Return to top of document
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)Return to top of document
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.Return to top of document
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)Return to top of document
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.Return to top of document
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.Return to top of document
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)Return to top of document
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
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
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.Return to top of document
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.Return to top of document
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