MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR JANUARY 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 8 27 05 21 97 9.0 95 10.9 -3.2 -2.1 5.0 4.2 3.7 3.7 4.3 7.0 20 0 4.5 1.2 000000 990.0 3.1 0.0 0.8 02 7 22 13 02 97 10.4 80 10.7 9.0 5.5 6.4 5.9 6.7 5.1 4.8 6.8 10 0 1.7 0.1 000000 983.5 1.2 0.0 0.7 03 6 27 02 02 97 2.3 95 10.2 1.7 -2.2 3.4 3.9 5.2 5.7 5.4 6.7 10 0 8.0 3.0 000000 1003.0 5.6 0.0 0.6 04 8 21 05 63 95 7.9 96 8.9 2.3 -0.1 7.1 6.4 6.2 5.9 5.7 6.9 10 0 4.1 0.0 000000 988.5 7.7 0.0 0.5 05 8 04 05 02 97 6.8 94 7.4 5.9 2.9 5.8 6.1 6.3 6.3 5.9 7.0 10 0 0.0 0.0 000000 984.0 0.0 0.0 0.2 06 0 36 02 02 97 2.3 96 8.0 2.2 -2.0 4.4 4.7 5.9 6.4 6.3 7.1 10 0 0.0 2.6 000000 1000.0 0.0 0.0 0.4 07 0 00 00 02 96 0.8 98 7.1 0.7 -3.6 2.7 3.0 4.6 5.9 6.2 7.2 10 0 0.0 6.0 000000 1009.0 0.0 0.0 0.3 08 7 22 02 03 97 2.5 98 8.1 0.1 -4.5 2.6 2.7 3.5 5.2 5.6 7.1 10 0 0.5 3.5 000000 1015.0 0.3 0.0 0.3 09 0 00 00 10 95 -0.3 99 4.9 -1.3 -4.1 1.7 1.9 3.4 5.0 5.4 7.1 40 0 0.0 1.8 000000 1016.0 0.0 3.0 0.4 10 8 08 09 03 97 4.9 85 6.0 -0.3 -1.5 3.3 3.0 3.8 4.7 5.3 7.0 10 0 tr 0.0 000000 1010.5 0.0 0.0 1.5 11 8 09 13 02 97 4.1 69 6.0 4.1 2.1 3.4 3.5 4.2 5.0 5.3 6.8 10 0 0.0 0.0 000000 1020.5 0.0 0.0 2.4 12 8 10 13 02 97 5.1 75 7.1 3.7 1.2 3.0 2.9 3.9 4.5 5.3 6.8 10 0 0.0 3.6 000000 1028.0 0.0 0.0 1.7 13 1 07 05 02 97 1.8 92 8.0 1.6 -2.9 2.1 2.2 3.6 4.7 5.0 6.7 10 0 0.0 6.3 000000 1032.5 0.0 0.0 1.5 14 0 12 02 02 97 2.4 86 7.6 1.5 -3.0 1.4 1.6 2.9 4.3 4.8 6.6 40 0 0.0 6.3 000000 1036.5 0.0 0.0 1.1 15 7 03 02 02 97 2.0 84 5.0 1.8 -0.8 2.3 2.2 3.1 4.3 4.6 6.5 10 0 0.0 3.8 000000 1026.5 0.0 2.0 0.7 16 1 00 00 02 97 -1.5 96 3.0 -2.8 -7.1 0.8 1.0 2.4 4.0 4.4 6.3 40 0 0.0 4.1 000000 1024.5 0.0 9.5 0.7 17 2 13 02 02 96 -2.4 98 4.4 -3.4 -7.1 0.6 0.7 2.0 3.5 4.1 6.2 40 0 0.0 4.5 000000 1022.0 0.0 11.7 0.3 18 8 16 02 02 96 -0.3 95 1.9 -3.7 -7.4 0.5 0.5 1.8 3.1 3.7 6.1 40 0 tr 2.2 000000 1021.0 0.0 17.0 0.3 19 8 17 02 26 96 -0.1 95 2.3 -3.0 -6.5 0.6 0.4 1.5 2.9 3.6 5.9 40 0 tr 1.0 500000 1023.5 0.0 12.3 0.3 20 8 16 02 02 96 -0.1 96 2.9 -3.4 -7.5 0.6 0.5 1.5 2.9 3.4 5.6 X1 <1 4.8 3.6 500000 1027.0 4.0 12.2 0.3 21 8 16 05 68 94 1.3 98 6.0 -2.5 -6.0 0.5 0.5 1.5 2.7 3.2 5.5 X1 <1 5.2 0.0 100000 1017.0 3.5 4.7 0.0 22 8 00 00 02 96 6.0 98 9.0 1.3 0.7 2.8 2.2 2.5 3.0 3.2 5.4 10 0 4.0 0.0 000000 1004.5 3.7 0.0 0.2 23 6 22 02 02 96 7.3 93 12.2 1.9 -2.9 1.7 2.2 3.2 3.6 3.5 5.3 10 0 5.5 2.6 000000 996.0 2.0 0.0 1.4 24 1 17 02 02 97 6.8 82 10.4 4.7 2.0 5.1 4.9 5.3 4.7 4.1 5.3 10 0 7.0 6.3 000000 993.0 4.0 0.0 1.2 25 7 21 02 02 97 5.8 98 9.1 2.5 -2.0 3.8 3.9 3.8 5.0 4.6 5.5 10 0 0.7 3.1 000000 999.0 0.3 0.0 0.5 26 3 22 02 25 97 3.5 93 9.0 1.0 -4.0 3.2 3.1 4.0 4.8 4.7 5.6 10 0 21.4 2.2 500000 999.0 9.8 0.0 0.5 27 0 34 02 02 97 2.3 93 7.5 1.0 -2.9 1.7 1.8 3.2 4.5 4.6 5.7 X1 <1 0.0 5.6 000000 1001.0 0.0 0.0 0.4 28 1 36 02 02 97 -2.0 98 6.7 -3.0 -6.5 0.9 1.1 2.5 4.0 4.3 5.8 40 0 0.0 5.6 000000 1005.5 0.0 9.5 0.4 29 8 27 02 02 97 2.9 88 4.9 -2.0 -2.0 2.2 1.8 2.7 3.7 4.2 5.7 10 0 0.0 2.0 000000 1020.5 1.5 0.0 0.4 30 8 22 02 60 96 2.8 96 5.2 -0.4 -4.4 1.8 1.7 2.6 3.6 4.1 5.6 10 0 4.4 0.0 000000 1021.5 14.0 2.2 0.1 31 8 00 00 44 06 5.2 98 5.5 2.8 0.3 3.9 3.6 3.9 4.0 4.2 5.5 10 0 0.3 0.0 000001 1023.0 1.1 0.0 0.1 Monthly means 3.2 92 7.0 0.7 -2.5 2.8 2.7 3.6 4.4 4.6 6.3 1011.0 Monthly totals 72.1 81.0 61.8 84.1 20.2 Highest values 10.4 12.2 9.0 5.5 7.1 6.4 6.7 6.4 6.3 7.2 21.4 6.3 14.0 17.0 2.4 Lowest values -2.4 69 1.9 -3.7 -7.5 0.5 0.4 1.5 2.7 3.2 5.3 1971-2000 monthly climatological averages 89 7.5 1.6 -0.7 3.5 3.7 4.5 5.1 5.4 6.6 60.4 49.0 1016.1 62.5 91.6 23.4 Number of days with 2001 normal Snow/sleet falling 4 2.9 50% snow cover 09GMT 0 1.7 Hail or ice pellets 0 0.4 Thunder 0 0.4 Gale 0 0.6 Fog at 09GMT 1 2.6 Air frost 12 10.2 Ground frost 24 17.4 0.2mm precipitation 14 15.5 1.0mm precipitation 11 11.2 5.0mm precipitation 5 4.7 No sunshine 8 13.4 A cool and wet month at times, but without any very cold days. It was the coldest January since 1997, and the sunniest January since before 1953. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 3 cloud increasing 10 mist 21 recent rain 25 recent rain shower 26 recent snow shower 40 fog 60 intermittent slight rain 63 continuous moderate rain 68 slight rain and snow VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (X1 slight snow, 10 moist, 20 wet, 40 frozen) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR FEBRUARY 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 9 00 00 45 02 -0.2 98 5.7 -0.3 -5.0 2.5 2.3 3.2 4.0 4.2 5.5 10 0 6.6 2.6 000001 1032.5 10.4 1.5 0.2 02 8 31 05 51 08 5.7 98 8.4 -0.6 -1.0 3.3 3.3 3.9 4.1 4.1 5.4 10 0 4.5 0.1 000001 1018.0 3.1 0.0 0.3 03 8 31 05 02 97 8.4 94 11.0 5.1 2.1 5.1 4.5 4.6 4.5 4.4 5.4 10 0 8.7 2.6 000000 1006.0 8.7 0.0 0.5 04 8 20 02 61 94 5.8 98 10.3 4.2 0.4 4.9 4.4 4.9 5.0 4.6 5.4 20 0 8.8 0.0 000000 1000.0 7.8 0.0 0.4 05 7 20 02 02 97 7.7 91 11.3 5.8 2.9 5.7 5.6 6.0 5.6 5.1 5.5 10 0 6.2 0.0 000000 995.5 4.9 0.0 0.8 06 8 18 19 17 96 9.7 80 12.1 7.7 2.5 7.6 7.2 6.9 6.1 5.4 5.7 20 0 3.4 2.0 004100 993.0 1.2 0.0 1.6 07 3 18 05 02 97 9.4 88 13.0 7.1 4.1 6.0 5.8 6.3 6.5 5.7 6.0 10 0 9.3 3.8 000000 999.0 8.0 0.0 0.7 08 8 07 02 60 96 5.3 91 5.5 5.3 0.5 6.4 6.3 6.7 6.8 6.2 6.2 20 0 2.0 0.0 000000 997.0 2.0 0.0 1.2 09 3 32 02 02 97 1.7 75 7.8 1.1 -2.6 2.6 2.9 4.5 5.9 5.8 6.3 10 0 0.0 6.1 000000 1020.0 0.0 0.0 0.8 10 8 27 09 03 97 6.3 82 12.0 -0.8 -4.9 3.9 3.4 4.3 5.5 5.5 6.3 10 0 2.2 0.0 000000 1026.5 3.2 3.8 0.3 11 8 24 09 21 97 12.0 91 13.0 6.3 4.0 8.2 7.5 6.4 5.9 5.4 6.2 10 0 1.2 0.0 000000 1026.5 1.1 0.2 1.2 12 8 21 05 60 97 11.3 87 11.3 11.3 9.3 8.8 8.3 8.0 7.0 5.9 6.3 10 0 10.7 0.0 000000 1019.0 8.4 0.0 0.9 13 2 31 02 02 97 4.0 83 11.1 0.9 -3.1 3.8 4.3 5.9 6.9 6.4 6.5 10 0 0.0 9.5 000000 1038.5 0.0 0.0 1.1 14 1 00 00 02 97 1.3 96 12.0 1.0 -4.2 2.8 3.1 4.9 6.2 6.3 6.7 10 0 0.0 9.1 000000 1035.5 0.0 1.5 1.0 15 9 00 00 45 04 2.1 98 8.4 1.3 -2.6 4.1 4.0 4.9 5.9 6.2 6.6 10 0 tr 4.4 000001 1034.0 0.0 0.8 0.1 16 8 32 02 02 95 5.6 90 10.4 -1.4 -4.9 2.9 2.6 3.9 5.4 5.7 6.6 10 0 tr 5.8 000000 1034.5 0.0 2.8 0.9 17 0 00 00 02 96 1.6 93 10.0 -1.9 -5.9 1.8 2.2 3.9 5.2 5.4 6.5 40 0 0.0 9.0 000000 1043.5 0.0 5.0 1.1 18 8 00 00 02 95 0.9 96 7.6 -1.4 -5.9 2.2 2.3 3.6 5.0 5.3 6.4 40 0 0.0 1.0 000000 1043.0 0.0 2.2 0.3 19 9 22 02 45 02 0.2 97 8.0 -0.6 -3.4 2.3 2.5 3.5 5.0 5.1 6.2 10 0 0.1 1.5 000001 1042.0 0.1 1.1 0.3 20 2 27 02 10 04 1.0 97 9.1 0.2 -2.5 3.0 3.2 3.9 5.3 5.3 6.1 10 0 0.0 2.0 000001 1039.5 0.0 0.0 0.5 21 7 25 05 02 97 7.7 84 12.5 1.0 -0.5 5.0 4.4 4.9 5.3 5.3 6.1 10 0 0.0 0.7 000000 1033.5 0.0 0.0 0.9 22 7 24 05 02 94 7.8 93 10.6 5.6 2.0 5.9 5.6 6.2 6.0 5.5 6.2 10 0 0.3 2.5 000000 1024.0 0.2 0.0 1.5 23 7 34 05 02 97 5.3 67 7.8 4.6 0.5 4.5 4.9 5.9 6.8 5.8 6.4 10 0 0.1 2.9 500000 1013.5 0.3 0.0 1.5 24 3 02 09 02 97 2.6 70 6.4 1.8 -2.0 3.2 3.3 4.5 5.6 5.6 6.4 10 0 0.1 8.3 000000 1016.0 0.1 0.0 0.5 25 2 02 05 02 97 1.2 70 6.1 -1.9 -5.5 1.5 1.7 3.6 5.0 5.4 6.4 X5 <1 0.0 9.2 500000 1017.5 0.0 4.8 2.6 26 2 36 02 02 97 3.6 76 7.1 -1.0 -5.0 1.7 2.0 3.5 4.6 5.1 6.3 40 0 5.4 1.4 000000 1007.5 4.2 1.5 0.7 27 7 03 05 02 97 4.3 92 7.8 0.0 -5.6 3.1 2.8 3.8 4.5 4.9 6.1 10 0 0.4 2.2 005000 991.0 0.1 0.0 0.8 28 8 36 05 02 94 5.1 96 5.1 1.8 -1.6 3.3 3.1 4.0 4.8 4.8 6.0 10 0 2.3 0.1 500000 997.0 6.2 0.0 0.9 Monthly means 4.9 88 9.3 2.2 -1.4 4.1 4.1 4.9 5.5 5.4 6.1 1019.4 Monthly totals 72.3 86.8 70.0 25.2 23.6 Highest values 12.0 13.0 11.3 9.3 8.8 8.3 8.0 7.0 6.4 6.7 10.7 9.5 10.4 5.0 2.6 Lowest values -0.2 67 5.1 -1.9 -5.9 1.5 1.7 3.2 4.0 4.1 5.4 1971-2000 monthly climatological averages 88 8.3 1.6 -1.3 3.4 3.6 4.5 5.0 5.1 6.1 42.8 67.5 1016.8 45.7 95.2 31.1 Number of days with 2001 normal Snow/sleet falling 3 3.0 50% snow cover 09GMT 0 1.7 Hail or ice pellets 2 0.4 Thunder 1 0.2 Gale 0 0.3 Fog at 09GMT 5 2.4 Air frost 9 9.3 Ground frost 18 17.5 0.2mm precipitation 15 11.4 1.0mm precipitation 13 9.1 5.0mm precipitation 7 3.0 No sunshine 6 9.2 A warmer-than-average February, but the coldest since 1996. The lowest minimum temperature (-1.9C) was the highest for February since 1990, while the minimum on the 12th was the highest since before 1953. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 3 cloud increasing 10 mist 17 thunder 21 recent rain 45 fog 51 continuous slight drizzle 60 intermittent slight rain 61 continuous slight rain VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (X5 slight snow, 10 moist, 20 wet, 40 frozen) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR MARCH 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 8 02 09 70 97 1.5 88 4.2 1.0 -0.5 2.6 2.4 3.6 4.5 4.7 6.0 10 0 tr 1.0 500000 1001.0 0.0 4.0 0.8 02 2 01 05 01 97 -1.2 89 3.3 -3.2 -7.0 0.8 0.9 2.6 3.9 4.3 5.9 X1 <1 0.3 2.0 500000 1004.5 0.2 10.1 0.7 03 7 04 05 02 97 1.4 80 4.7 -1.2 -4.0 1.7 1.7 2.6 3.5 3.9 5.7 X3 1 0.0 4.3 510000 1001.0 0.0 0.2 1.6 04 8 05 05 02 97 0.9 85 5.8 -0.3 -1.4 1.7 1.7 2.5 3.5 3.7 5.5 10 0 tr 1.4 500000 999.0 0.0 4.2 1.1 05 0 00 00 02 96 -1.3 93 8.9 -5.5 -8.9 0.6 0.7 2.2 3.4 3.7 5.4 40 0 0.0 6.7 000000 1018.5 0.0 9.6 1.6 06 0 00 00 02 96 3.7 91 14.0 -1.3 -4.1 2.4 1.6 2.7 3.7 3.8 5.3 40 0 7.3 6.0 000000 1017.5 5.8 0.0 1.9 07 7 20 05 01 97 12.3 86 15.1 3.7 7.0 7.2 6.4 5.9 4.9 4.3 5.2 10 0 0.1 4.0 000000 1007.0 0.1 0.0 1.0 08 8 18 02 02 96 8.9 98 10.6 4.6 0.4 6.7 6.2 6.5 6.0 5.2 5.4 10 0 2.8 0.0 000000 1002.5 3.4 0.0 0.2 09 8 23 05 02 97 10.0 90 12.4 6.2 1.2 7.0 6.6 6.6 6.4 5.8 5.7 10 0 3.6 1.0 000000 1000.0 3.5 0.0 0.6 10 8 18 05 02 97 11.4 92 15.5 8.6 6.1 8.5 8.0 7.6 7.0 6.2 6.0 10 0 0.6 3.6 000000 999.5 0.2 0.0 1.1 11 8 18 05 02 97 12.0 86 13.2 9.9 5.9 9.1 8.6 8.4 7.7 6.7 6.2 10 0 7.9 0.0 000000 1005.0 4.8 0.0 0.5 12 0 27 02 02 97 6.9 81 11.9 3.0 -0.5 5.9 6.1 7.5 7.9 7.2 6.5 10 0 5.3 5.7 000100 1004.5 2.8 0.0 1.2 13 7 30 05 02 97 6.5 93 9.9 4.0 1.5 6.1 6.1 7.1 7.6 7.2 6.8 10 0 0.4 3.0 000000 998.0 0.7 0.0 0.9 14 2 33 02 02 96 7.6 85 13.0 1.9 -1.5 4.6 4.7 6.0 7.0 6.9 6.9 10 0 0.5 4.5 000000 1010.0 1.2 0.0 1.2 15 6 36 02 10 94 7.0 94 9.8 5.2 1.5 7.3 6.7 7.5 7.5 7.0 6.9 10 0 1.2 0.0 000000 1010.0 4.2 0.0 0.4 16 8 36 09 02 97 8.6 94 8.6 7.0 4.7 7.9 7.6 7.9 7.7 7.1 7.0 10 0 16.1 0.0 000000 1010.5 9.8 0.0 0.5 17 8 09 13 50 96 3.2 95 3.6 3.2 3.3 6.0 6.1 6.9 7.1 7.1 7.1 10 0 6.5 0.0 100000 1005.0 12.0 0.0 0.3 18 8 36 13 25 97 2.8 91 5.9 1.7 1.2 4.6 4.4 5.6 6.6 6.5 7.1 10 0 0.1 0.0 000000 1004.0 0.1 0.0 1.0 19 2 27 05 03 97 3.0 78 8.4 1.2 -1.2 3.6 3.7 5.0 5.9 6.1 7.0 10 0 0.0 6.8 000000 1017.5 0.0 0.0 2.1 20 8 09 13 02 97 3.6 63 4.5 2.5 -0.9 4.0 4.1 5.4 6.1 6.1 6.9 10 0 14.8 0.0 000000 1013.5 11.3 0.0 1.4 21 8 10 05 60 94 3.9 95 7.0 1.9 -0.5 3.8 3.7 4.6 5.5 5.6 6.8 20 0 4.1 0.0 000000 999.0 5.8 0.0 0.3 22 8 19 05 60 95 7.0 96 14.7 3.2 3.0 5.7 5.3 5.7 5.7 5.4 6.6 20 0 5.8 2.7 000000 1000.5 6.1 0.0 0.9 23 8 22 09 61 94 9.8 97 11.0 7.0 6.6 8.2 7.7 7.6 6.9 6.1 6.5 20 0 6.8 0.0 000000 998.0 4.3 0.0 0.3 24 8 09 02 02 96 8.3 93 9.4 7.4 5.5 8.3 7.8 7.9 7.5 6.6 6.6 10 0 0.4 0.0 000000 1003.0 1.2 0.0 0.3 25 8 04 05 02 96 6.0 77 6.7 5.0 -1.3 7.2 6.9 7.4 7.5 6.8 6.8 10 0 0.0 0.0 000000 1005.0 0.0 0.0 1.2 26 8 04 05 02 96 4.8 78 7.0 3.4 2.8 5.0 4.9 6.4 6.9 6.4 6.9 10 0 0.0 0.0 000000 1012.0 0.0 0.0 1.2 27 8 09 09 02 95 6.7 82 8.6 3.6 3.5 5.8 5.6 6.5 6.7 6.4 7.0 10 0 9.2 1.5 000000 1008.5 6.3 0.0 0.7 28 8 15 02 21 95 7.0 93 12.0 5.5 2.3 6.4 6.2 6.7 6.9 6.4 7.0 20 0 5.4 3.1 000000 996.5 2.7 0.0 0.6 29 7 22 02 02 97 7.1 83 12.4 4.1 1.6 6.6 6.4 7.2 7.3 6.6 6.9 10 0 0.0 5.8 000000 996.5 0.0 0.0 1.3 30 7 27 02 02 97 7.5 68 14.6 3.2 -0.3 5.7 5.8 7.1 7.5 7.0 7.0 10 0 0.9 9.2 000000 1013.0 1.0 0.0 2.8 31 7 29 09 02 06 12.5 88 15.7 6.9 3.9 8.8 8.4 8.6 8.2 7.5 7.2 10 0 0.0 2.0 000000 1016.0 0.0 0.0 1.3 Monthly means 6.1 87 9.8 3.3 1.0 5.5 5.3 6.0 6.3 5.9 6.4 1005.7 Monthly totals 100.1 74.3 87.5 28.1 31.0 Highest values 12.5 15.7 9.9 7.0 9.1 8.6 8.6 8.2 7.5 7.2 16.1 9.2 12.0 10.1 2.8 Lowest values -1.3 63 3.3 -5.5 -8.9 0.6 0.7 2.2 3.4 3.7 5.2 1971-2000 monthly climatological averages 84 11.2 3.3 0.5 5.2 5.5 6.4 6.6 6.5 6.7 48.5 102.9 1015.5 47.5 24.2 44.2 Number of days with 2001 normal Snow/sleet falling 5 2.0 50% snow cover 09GMT 1 0.2 Hail or ice pellets 0 1.0 Thunder 1 0.5 Gale 0 0.4 Fog at 09GMT 0 0.9 Air frost 5 5.4 Ground frost 13 14.7 0.2mm precipitation 20 14.6 1.0mm precipitation 14 10.1 5.0mm precipitation 10 2.5 No sunshine 12 6.7 The minimum temperature on the 5th was the lowest in March since 1971 when -5.8C occurred.The 16th was the wettest day since 1984, when 20.5mm fell in a single day. The wettest March since 1981 overall. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 1 cloud decreasing 2 sky not changing 3 cloud increasing 10 mist 21 recent rain 25 recent rain shower 50 intermittent slight drizzle 60 intermittent slight rain 61 continuous slight rain 70 intermittent slight snow VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (X1 slight snow, 10 moist, 20 wet, 40 frozen) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR APRIL 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 8 28 05 02 97 12.8 79 16.5 8.3 4.1 9.4 9.2 9.3 8.8 7.8 7.4 10 0 0.0 3.5 000000 1022.5 0.0 0.0 1.3 02 7 22 02 02 96 12.9 78 19.4 6.9 3.0 8.8 9.4 9.5 9.2 8.2 7.5 10 0 5.0 5.1 000000 1012.0 3.4 0.0 1.2 03 0 30 02 02 96 10.1 83 13.4 6.0 2.0 8.4 8.9 10.1 9.9 8.7 7.8 10 0 7.9 7.8 000000 1014.5 8.2 0.0 1.4 04 8 24 05 02 97 7.2 89 12.1 5.8 4.0 8.8 8.9 9.9 9.9 8.9 8.1 10 0 3.1 6.4 000000 1002.5 1.9 0.0 1.4 05 7 22 05 03 97 7.7 82 12.0 2.0 -2.0 6.4 6.5 8.2 9.1 8.7 8.2 10 0 6.5 0.1 000000 1012.5 4.5 0.0 1.1 06 7 27 05 02 97 10.2 82 14.0 7.5 0.2 8.3 9.2 8.7 8.7 8.3 8.2 10 0 4.8 0.5 005000 1005.5 2.0 0.0 1.0 07 1 30 02 02 97 9.4 84 11.3 2.6 -1.0 6.4 6.7 8.2 8.9 8.3 8.3 10 0 2.1 6.7 000000 1000.0 2.1 0.0 1.7 08 3 27 02 03 97 10.4 61 13.5 4.1 1.0 6.7 7.0 8.3 9.0 8.5 8.3 10 0 15.2 6.8 000000 1021.0 8.2 0.0 1.1 09 7 24 02 03 95 11.6 94 18.4 7.4 0.9 8.8 8.6 9.3 9.1 8.6 8.4 10 0 1.5 5.9 000000 1015.0 0.4 0.0 1.7 10 7 32 09 02 97 10.9 69 12.4 8.3 6.8 9.4 9.5 10.1 9.8 8.9 8.4 10 0 tr 2.9 000000 1013.5 0.0 0.0 2.1 11 8 32 09 02 97 8.6 78 11.5 5.8 3.4 7.7 7.8 8.9 9.4 9.0 8.5 10 0 0.0 0.2 000000 1028.0 0.0 0.0 1.3 12 7 34 02 02 96 11.5 75 14.0 5.4 2.9 7.7 7.9 8.9 9.0 8.7 8.6 10 0 0.0 2.9 000000 1032.0 0.0 0.0 2.2 13 8 36 05 02 97 6.0 62 11.8 4.8 3.5 8.3 9.3 9.4 9.5 8.7 8.6 10 0 0.0 7.4 000000 1034.0 0.0 0.0 2.1 14 8 31 02 03 96 7.3 71 11.6 2.2 0.2 7.6 7.6 9.0 9.4 8.9 8.7 10 0 2.5 0.0 000000 1030.0 4.7 0.0 0.6 15 7 35 05 02 97 10.9 68 13.8 4.7 4.8 9.8 9.2 9.4 9.3 8.7 8.8 10 0 0.4 4.7 000000 1014.0 0.3 0.0 1.9 16 8 35 09 21 97 9.3 63 10.4 5.6 3.0 8.4 8.4 9.3 9.3 8.8 8.7 10 0 tr 2.4 000000 1020.5 0.0 0.0 1.8 17 4 03 02 02 97 9.2 61 12.6 -0.9 -2.6 5.6 6.0 7.9 8.9 8.6 8.7 10 0 0.9 4.8 000000 1023.0 1.6 2.8 1.9 18 2 36 09 02 97 6.4 66 9.6 2.7 1.2 7.0 7.5 9.0 9.0 8.6 8.7 10 0 tr 7.7 000000 1014.5 0.0 0.0 1.9 19 1 36 05 02 97 7.1 54 11.0 0.0 -2.4 5.4 5.9 7.8 8.7 8.6 8.6 10 0 1.7 9.4 000000 1015.5 0.6 0.0 1.9 20 6 35 13 02 97 6.5 69 9.1 2.5 -0.5 5.7 5.8 7.6 8.4 8.4 8.6 10 0 0.4 5.8 005000 1016.5 0.1 0.0 0.9 21 2 31 05 02 97 7.6 61 11.0 2.4 -1.1 5.6 5.7 7.2 8.1 8.1 8.5 10 0 0.0 5.6 000000 1019.0 0.0 0.0 1.5 22 7 29 09 02 97 9.7 53 11.7 4.0 1.4 8.8 8.1 8.2 8.1 8.0 8.5 10 0 10.6 1.1 000000 1008.0 14.0 0.0 1.6 23 8 27 05 61 95 7.7 90 14.5 6.9 6.2 8.1 8.1 8.7 8.6 8.2 8.5 10 0 1.3 5.1 000000 1004.5 2.2 0.0 1.4 24 8 19 02 02 96 8.4 89 12.5 4.3 0.6 8.1 8.2 9.1 9.0 8.4 8.4 10 0 3.0 3.2 000000 1003.0 2.4 0.0 0.6 25 7 18 02 03 97 12.6 70 13.8 4.0 0.5 7.2 7.2 8.2 8.7 8.3 8.5 10 0 5.6 3.4 000000 1003.5 2.3 0.0 1.1 26 7 20 05 02 97 8.8 86 14.7 4.9 1.2 8.1 8.2 9.1 9.1 8.5 8.5 10 0 0.3 3.9 000000 1014.0 0.2 0.0 1.1 27 8 00 00 02 96 8.1 89 16.6 4.7 0.9 8.8 8.7 9.4 9.5 8.6 8.5 10 0 2.7 3.7 000000 1015.0 1.2 0.0 1.7 28 1 24 13 02 97 12.4 67 14.6 6.5 6.4 10.0 10.0 10.6 10.0 9.2 8.7 10 0 8.3 8.4 000000 1007.5 3.8 0.0 1.5 29 8 26 05 61 94 9.2 80 13.8 3.9 0.9 8.8 8.9 9.8 10.0 9.4 8.9 20 0 tr 3.2 000000 1003.5 0.0 0.0 1.6 30 7 22 02 02 97 11.3 68 13.9 5.5 2.9 9.2 9.3 9.4 10.2 9.5 9.0 10 0 0.0 3.5 000000 1013.0 0.0 0.0 2.7 Monthly means 9.4 74 13.2 4.6 1.7 7.9 8.1 9.0 9.2 8.6 8.4 1014.6 Monthly totals 83.8 132.1 64.1 2.8 45.3 Highest values 12.9 19.4 8.3 6.8 10.0 10.0 10.6 10.2 9.5 9.0 15.2 9.4 14.0 2.8 2.7 Lowest values 6.0 53 9.1 -0.9 -2.6 5.4 5.7 7.2 8.1 7.8 7.4 1971-2000 monthly climatological averages 77 13.7 4.9 2.0 7.5 7.9 8.6 9.0 8.5 8.3 47.2 143.1 1015.4 50.4 6.6 44.2 Number of days with 2001 normal Snow/sleet falling 0 1.0 50% snow cover 09GMT 0 0.0 Hail or ice pellets 2 1.0 Thunder 0 0.8 Gale 0 0.0 Fog at 09GMT 0 0.1 Air frost 1 1.0 Ground frost 6 9.0 0.2mm precipitation 24 12.8 1.0mm precipitation 20 9.5 5.0mm precipitation 11 3.2 No sunshine 1 3.1 April was wet and, although there were frequent falls of rain, no days were particularly wet. After a warm start to the month, daytime temperatures were mainly on the cool side. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 3 cloud increasing 21 recent rain 61 continuous slight rain VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (X1 slight snow, 10 moist, 20 wet, 40 frozen) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR MAY 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 8 04 19 02 97 8.0 76 11.1 6.4 4.0 8.4 8.8 9.9 10.0 9.4 9.1 10 0 2.4 0.0 000000 1020.0 2.2 0.0 1.7 02 8 05 09 02 97 9.5 72 14.8 6.8 6.2 8.9 8.8 9.5 9.6 9.4 9.1 10 0 1.7 0.3 000000 1023.5 1.5 0.0 1.6 03 7 36 02 02 97 13.2 52 17.4 6.5 3.0 8.8 8.6 9.4 9.4 9.1 9.1 10 0 0.0 3.6 000000 1012.0 0.0 0.0 2.6 04 1 33 05 02 97 9.4 81 14.0 4.5 2.2 8.7 8.9 10.0 10.0 9.3 9.1 10 0 0.0 10.1 000000 1016.0 0.0 0.0 2.7 05 2 36 05 02 97 10.5 61 13.6 3.8 0.6 7.9 8.2 9.4 10.0 9.5 9.2 10 0 0.0 10.1 001000 1023.5 0.0 0.0 2.8 06 8 03 13 02 97 9.1 65 12.5 4.2 0.7 8.8 8.7 9.6 10.0 9.5 9.3 00 0 0.0 1.2 000000 1027.0 0.0 0.0 2.6 07 6 33 13 03 97 11.5 62 16.4 5.1 3.1 7.3 7.2 9.2 9.6 9.3 9.3 00 0 0.0 8.3 000000 1029.5 0.0 0.0 2.7 08 0 35 05 02 97 13.2 42 18.5 3.8 1.2 8.4 8.9 10.3 10.2 9.5 9.4 00 0 0.0 13.0 000000 1030.5 0.0 0.0 3.8 09 5 32 09 02 97 9.1 73 16.6 5.3 2.5 10.0 10.1 11.4 11.0 10.1 9.4 00 0 0.2 0.7 000000 1025.0 0.3 0.0 1.7 10 6 00 00 02 96 15.2 77 23.4 10.2 7.0 11.3 11.2 11.8 11.0 10.1 9.5 10 0 2.0 4.5 000100 1019.5 0.5 0.0 2.0 11 4 03 02 02 96 17.3 67 27.6 12.0 8.8 12.7 12.7 13.0 12.0 11.1 9.6 10 0 0.0 7.9 000100 1021.5 0.0 0.0 3.7 12 1 18 05 02 97 20.0 48 26.7 10.2 7.1 12.7 12.8 13.6 12.9 12.0 10.0 00 0 0.0 14.6 000000 1022.0 0.0 0.0 4.7 13 6 13 02 03 97 15.3 66 26.4 11.2 7.9 13.8 13.8 14.5 13.6 12.8 10.3 00 0 0.0 8.0 000100 1011.0 0.0 0.0 3.6 14 8 07 02 03 96 12.7 83 15.8 11.6 11.4 14.8 14.9 15.5 14.4 13.2 10.6 00 0 tr 0.0 000000 1008.5 0.0 0.0 0.7 15 8 05 02 02 96 13.3 79 21.0 10.1 8.1 13.4 13.6 14.1 13.5 13.1 11.0 00 0 11.1 5.0 000100 1007.0 5.7 0.0 1.5 16 8 22 02 61 95 12.2 93 16.9 10.7 8.3 13.8 14.0 14.9 14.1 13.4 11.1 10 0 7.3 3.1 000100 999.5 3.0 0.0 1.2 17 7 27 19 60 96 6.4 88 11.4 6.4 6.5 12.3 12.7 13.8 13.9 13.4 11.4 10 0 10.0 0.0 000000 1002.0 6.8 0.0 0.9 18 8 32 09 02 97 12.0 67 17.9 6.4 6.2 10.8 10.9 11.8 12.5 12.6 11.5 10 0 0.0 5.4 000000 1020.0 0.0 0.0 1.7 19 7 00 00 02 97 14.4 73 16.8 5.5 3.4 12.3 11.9 12.5 12.6 12.6 11.4 10 0 0.0 0.1 000000 1026.5 0.0 0.0 1.2 20 7 22 09 02 97 15.5 72 19.6 9.1 7.2 13.0 12.8 13.0 12.9 12.5 11.4 10 0 0.0 1.0 000000 1027.5 0.0 0.0 1.7 21 0 00 00 02 97 16.9 45 20.4 7.1 4.1 11.7 12.1 13.3 13.1 12.7 11.4 10 0 0.0 13.6 000000 1027.5 0.0 0.0 3.7 22 1 03 05 02 97 16.2 47 21.0 6.6 3.9 11.4 12.1 13.4 13.6 13.1 11.5 00 0 0.0 12.0 000000 1025.0 0.0 0.0 3.5 23 2 09 02 02 97 18.2 67 24.1 8.9 5.7 12.7 13.3 14.4 14.1 13.4 11.6 00 0 0.0 13.0 000000 1025.5 0.0 0.0 3.1 24 4 09 02 03 97 18.9 42 24.3 8.8 6.2 13.5 13.9 15.1 14.6 14.0 11.8 00 0 0.0 12.9 000000 1025.5 0.0 0.0 3.7 25 8 10 02 02 97 11.7 75 21.4 10.2 7.6 14.8 15.2 15.9 15.3 14.4 12.0 90 0 0.0 7.4 000000 1024.5 0.0 0.0 2.0 26 4 00 00 02 97 16.9 69 24.1 11.7 9.0 16.0 15.8 16.1 15.4 14.6 12.3 90 0 tr 8.8 000000 1020.5 0.0 0.0 2.1 27 8 22 02 60 97 15.0 81 20.7 13.6 13.2 16.6 16.6 16.9 15.8 15.0 12.5 90 0 tr 1.2 000000 1022.0 0.0 0.0 1.9 28 8 21 09 02 97 18.0 84 24.5 14.7 14.9 16.3 16.5 17.0 16.1 15.0 12.7 90 0 tr 8.0 000000 1022.0 0.0 0.0 1.7 29 2 27 02 02 97 19.0 58 23.6 10.4 8.1 15.3 15.9 17.2 16.4 15.4 12.9 90 0 0.0 12.2 000000 1022.5 0.0 0.0 2.5 30 3 25 02 02 97 19.1 56 24.0 10.7 8.5 15.7 16.2 17.2 16.6 15.8 13.1 90 0 0.0 13.0 000000 1020.0 0.0 0.0 3.1 31 6 31 02 03 06 15.8 70 19.2 10.3 8.1 15.6 16.2 17.6 17.0 16.0 13.4 90 0 tr 4.4 000000 1020.0 0.0 0.0 2.6 Monthly means 14.0 67 19.5 8.5 6.3 12.2 12.4 13.3 12.9 12.3 10.8 1020.2 Monthly totals 34.7 203.4 20.0 0.0 75.0 Highest values 20.0 27.6 14.7 14.9 16.6 16.6 17.6 17.0 16.0 13.4 11.1 14.6 6.8 0.0 4.7 Lowest values 6.4 42 11.1 3.8 0.6 7.3 7.2 9.2 9.4 9.1 9.1 1971-2000 monthly climatological averages 73 17.4 8.0 5.6 11.0 11.2 12.4 12.4 11.5 10.5 50.9 187.6 1015.9 37.2 0.1 69.1 Number of days with 2001 normal Snow/sleet falling 0 0.1 50% snow cover 09GMT 0 0.0 Hail or ice pellets 1 0.5 Thunder 5 1.9 Gale 0 0.0 Fog at 09GMT 0 0.0 Air frost 0 0.1 Ground frost 0 2.2 0.2mm precipitation 7 12.2 1.0mm precipitation 6 8.8 5.0mm precipitation 3 2.9 No sunshine 3 2.8 A warm and sunny month, and mainly dry. Five days with thunderstorms, but non were heavy. Most of the rain fell during the 15th-17th. Maximum temperatures varied quite a lot from day to day. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 3 cloud increasing 60 intermittent slight rain 61 continuous slight rain VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (00 dry, 10 moist, 20 wet, 90 cracked) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR June 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 8 36 02 02 97 14.7 69 20.0 8.7 5.5 14.8 15.1 16.2 16.0 15.5 13.6 90 0 tr 2.0 000000 1024.0 0.0 0.0 2.4 02 8 36 13 60 97 13.6 76 17.4 12.9 11.8 15.8 15.8 16.3 15.8 15.2 13.6 90 0 0.4 3.0 000000 1014.5 0.7 0.0 2.3 03 1 36 13 02 97 11.9 50 17.9 5.4 2.7 12.1 12.8 14.8 15.1 14.9 13.6 90 0 0.0 13.9 000000 1026.0 0.0 0.0 2.6 04 8 27 05 03 97 13.7 73 20.6 5.9 3.4 13.3 13.5 15.0 15.1 14.7 13.6 90 0 0.0 7.6 000000 1027.0 0.0 0.0 2.3 05 2 22 02 02 97 18.3 58 21.5 8.9 5.9 13.8 14.2 15.3 15.0 14.6 13.5 90 0 tr 7.4 000000 1020.0 0.0 0.0 2.5 06 6 25 05 25 97 16.5 76 18.8 10.0 7.2 15.5 15.6 16.4 15.5 14.8 13.5 90 0 2.2 1.1 000000 1014.0 0.4 0.0 2.0 07 0 31 05 02 97 15.0 62 17.7 7.2 4.4 12.8 13.8 15.5 15.4 14.8 13.6 10 0 0.0 9.7 000000 1013.0 0.0 0.0 2.4 08 2 32 02 02 97 14.0 55 17.0 3.9 1.5 11.2 12.2 14.2 15.0 14.7 13.6 90 0 0.0 11.0 000000 1015.5 0.0 0.0 2.6 09 7 31 02 02 97 15.9 42 18.0 3.0 1.1 13.2 12.7 13.9 14.3 14.6 13.6 90 0 3.9 6.0 000000 1017.0 2.5 0.0 1.7 10 7 29 13 02 97 13.9 63 16.3 8.6 5.8 13.8 13.8 14.6 14.6 14.3 13.5 10 0 tr 4.9 000000 1017.0 0.0 0.0 1.8 11 0 00 00 02 97 16.3 45 19.0 4.8 3.8 10.9 12.7 13.5 14.2 14.1 13.4 00 0 0.0 8.1 000000 1024.5 0.0 0.0 2.5 12 8 27 02 02 97 16.0 53 19.1 11.7 10.2 14.4 14.7 15.4 14.8 14.3 13.4 00 0 0.0 1.8 000000 1021.5 0.0 0.0 2.3 13 7 00 00 02 97 17.3 51 21.4 11.1 10.4 14.8 14.9 15.7 15.1 14.4 13.4 90 0 0.0 5.8 000000 1017.0 0.0 0.0 3.0 14 3 16 05 03 96 17.5 58 22.1 8.6 6.5 14.1 14.6 15.9 15.5 14.7 13.5 90 0 1.5 9.1 000000 1015.5 1.6 0.0 2.1 15 8 22 02 02 96 16.8 76 20.2 11.7 10.5 15.6 15.9 16.5 16.0 15.0 13.6 10 0 18.0 5.0 000000 1009.0 5.3 0.0 1.6 16 8 13 05 02 97 15.8 91 18.8 13.0 13.5 15.4 16.0 16.4 16.1 14.9 13.7 10 0 8.6 1.5 000000 1004.0 4.0 0.0 1.2 17 8 33 09 50 96 13.9 84 16.1 12.0 12.0 14.0 15.0 15.5 15.7 14.8 13.8 10 0 0.0 0.7 000000 1015.5 0.0 0.0 1.1 18 1 29 05 02 97 15.6 51 19.5 9.1 7.4 12.8 13.4 14.8 15.1 14.6 13.9 10 0 0.0 6.1 000000 1029.0 0.0 0.0 2.1 19 6 21 05 02 97 18.3 60 22.4 11.4 8.4 14.3 14.6 15.5 15.5 14.6 13.9 10 0 0.0 10.9 000000 1029.0 0.0 0.0 3.0 20 3 27 05 03 97 19.3 50 24.5 10.4 8.4 14.2 14.8 15.9 15.8 14.9 13.9 10 0 0.0 10.8 000000 1020.5 0.0 0.0 2.7 21 0 26 02 02 97 17.5 54 22.5 9.3 7.9 14.6 15.4 16.8 16.3 15.3 14.0 10 0 0.0 14.0 000000 1020.0 0.0 0.0 2.8 22 0 23 05 02 97 16.9 59 23.4 8.5 6.9 14.5 15.4 16.7 16.6 15.5 14.1 00 0 0.0 12.5 000000 1019.5 0.0 0.0 3.3 23 5 20 13 02 97 17.0 63 23.7 12.2 10.1 16.0 16.5 17.2 16.8 15.9 14.2 00 0 0.0 9.6 000000 1020.0 0.0 0.0 2.7 24 0 00 00 02 97 22.1 61 27.7 11.4 10.0 17.7 17.2 17.6 17.0 16.2 14.5 00 0 0.0 13.8 000000 1021.5 0.0 0.0 2.7 25 5 00 00 02 97 23.0 62 29.9 13.9 11.7 17.7 18.1 18.8 18.0 16.7 14.6 00 0 0.0 13.1 000000 1024.0 0.0 0.0 5.5 26 1 09 09 02 97 24.7 45 32.1 16.2 13.5 18.8 19.1 19.7 18.7 17.3 14.9 90 0 tr 11.9 000000 1016.0 0.0 0.0 5.0 27 8 22 05 02 97 20.5 64 24.9 16.7 16.4 20.1 20.4 20.9 19.5 17.9 15.1 90 0 tr 6.7 000000 1010.5 0.0 0.0 2.9 28 7 24 09 21 97 19.2 74 23.3 14.1 11.9 18.8 18.9 19.8 19.0 18.0 15.4 90 0 0.1 3.6 000000 1015.5 0.2 0.0 2.3 29 7 18 05 02 97 18.9 75 21.3 15.9 13.1 19.0 19.2 19.4 18.6 17.7 15.6 90 0 2.4 1.3 000000 1020.0 0.4 0.0 1.9 30 6 22 05 02 97 21.1 72 23.6 15.1 14.4 18.9 18.7 19.0 18.3 17.6 15.7 10 0 0.0 9.6 000000 1020.0 0.0 0.0 2.7 Monthly means 17.2 62 21.4 10.4 8.5 15.1 15.5 16.4 16.1 15.4 14.0 1018.7 Monthly totals 37.1 222.5 15.1 0.0 76.0 Highest values 24.7 32.1 16.7 16.4 20.1 20.4 20.9 19.5 18.0 15.7 18.0 14.0 5.3 0.0 5.5 Lowest values 11.9 42 16.1 3.0 1.1 10.9 12.2 13.5 14.2 14.1 13.4 1971-2000 monthly climatological averages 74 20.0 10.9 8.9 14.3 14.6 15.6 15.3 14.4 12.9 52.0 180.0 1016.8 36.4 0.0 72.4 Number of days with 2001 normal Snow/sleet falling 0 0.0 50% snow cover 09GMT 0 0.0 Hail or ice pellets 0 0.1 Thunder 0 2.0 Gale 0 0.0 Fog at 09GMT 0 0.1 Air frost 0 0.1 Ground frost 0 2.2 0.2mm precipitation 7 11.5 1.0mm precipitation 6 8.9 5.0mm precipitation 2 3.5 No sunshine 0 2.3 32.2C on the 26th was the highest temperature since August 1995, and only three Junes in the last 48 years have seen a higher reading. 3.0C on the 9th was the lowest reading in June since 1991. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 50 intermittent light drizzle 3 cloud increasing 60 intermittent light rain 21 recent rain 25 recent rain shower VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (00 dry, 10 moist, 20 wet, 90 cracked) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR July 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 6 22 02 02 97 19.0 75 26.4 12.5 10.1 17.4 17.6 18.5 18.4 17.7 15.8 00 0 0.0 5.0 000000 1027.0 0.0 0.0 2.2 02 0 21 02 02 97 25.2 63 27.5 15.1 13.1 18.8 19.1 19.7 19.0 17.9 15.9 90 0 0.0 6.3 000000 1027.5 0.0 0.0 3.0 03 2 15 02 02 97 23.2 63 28.9 17.7 15.6 19.7 19.9 20.3 19.4 18.3 16.0 90 0 0.0 13.1 000000 1019.0 0.0 0.0 4.4 04 2 12 09 02 97 25.7 51 29.5 18.1 15.6 20.1 20.3 20.9 20.0 18.8 16.1 90 0 0.0 9.8 000000 1007.5 0.0 0.0 4.4 05 7 20 01 02 97 21.8 74 29.5 19.2 17.0 20.6 20.8 21.4 20.4 19.2 16.5 90 0 2.2 2.5 000100 1010.0 0.9 0.0 3.1 06 8 00 00 02 97 19.1 88 25.8 18.3 17.3 20.6 20.9 21.3 20.2 19.2 16.6 00 0 0.0 6.4 000000 1010.0 0.0 0.0 1.6 07 8 18 13 02 96 19.1 89 23.0 15.4 13.8 19.3 19.5 20.2 19.9 19.1 16.8 90 0 9.6 0.0 000100 1006.0 2.8 0.0 0.8 08 8 36 05 02 97 16.6 94 20.4 16.5 13.8 18.9 19.2 19.6 19.2 18.7 16.9 10 0 0.0 0.3 000000 1009.0 0.0 0.0 1.1 09 7 29 05 02 97 18.5 66 20.8 11.5 9.9 16.8 17.0 18.2 17.6 18.2 16.8 10 0 3.5 1.1 000000 1015.0 2.4 0.0 1.9 10 8 22 09 02 97 17.4 81 18.8 13.7 9.9 17.9 18.1 18.5 18.5 18.0 16.8 10 0 3.2 2.7 000000 1006.5 0.5 0.0 1.8 11 6 31 13 02 97 17.1 64 20.1 13.2 11.1 15.8 16.2 17.3 17.9 17.7 16.7 10 0 0.0 9.2 000000 1007.5 0.0 0.0 3.2 12 7 32 13 02 97 16.6 63 20.0 10.5 8.5 15.6 15.9 17.0 17.1 17.5 16.6 10 0 1.5 7.6 000000 1011.0 0.3 0.0 2.4 13 7 31 05 02 97 16.3 70 20.6 10.9 8.1 15.6 15.7 16.9 17.5 17.3 16.5 10 0 7.9 3.1 000000 1008.5 0.5 0.0 1.4 14 7 30 05 02 97 15.0 74 20.6 10.8 8.8 16.1 16.3 17.0 17.3 17.2 16.4 10 0 0.1 6.0 000100 1006.5 0.1 0.0 1.7 15 0 24 05 02 97 18.1 52 20.6 8.8 6.6 15.7 15.2 16.4 17.0 17.1 16.2 10 0 0.0 8.3 000000 1015.5 0.0 0.0 2.0 16 6 27 02 02 97 18.5 49 22.2 7.7 5.9 14.6 15.2 16.6 17.1 16.9 16.2 10 0 tr 12.4 000000 1018.0 0.0 0.0 4.4 17 8 09 09 02 97 18.5 59 20.6 10.0 7.0 15.3 15.8 17.0 17.5 17.0 16.1 10 0 11.8 1.7 000000 1005.0 8.2 0.0 0.7 18 5 22 05 02 97 16.6 77 20.6 13.2 10.5 15.8 16.1 16.5 17.0 16.8 16.1 10 0 1.8 4.7 000000 996.0 2.1 0.0 1.1 19 0 23 13 02 97 13.0 85 17.3 12.8 12.9 15.9 16.4 17.0 17.1 16.7 16.0 10 0 0.0 0.2 000000 1006.5 0.0 0.0 1.4 20 1 22 02 02 97 18.4 63 21.8 9.6 6.9 14.1 14.7 16.0 16.5 16.4 16.0 10 0 3.1 8.0 000000 1017.5 3.8 0.0 2.2 21 7 27 05 02 97 18.3 70 21.7 13.1 12.9 17.3 17.1 17.1 17.0 16.6 15.9 10 0 0.0 2.7 000000 1015.0 0.0 0.0 2.1 22 7 20 02 02 97 18.1 78 20.6 14.0 11.7 17.3 17.3 17.5 17.5 16.9 15.9 10 0 tr 0.2 000000 1017.5 0.0 0.0 1.1 23 5 16 02 02 97 22.6 57 25.1 10.7 8.8 16.1 16.3 17.3 17.3 17.0 16.0 10 0 0.0 10.5 000000 1019.0 0.0 0.0 2.8 24 6 27 05 02 97 19.9 51 22.9 11.5 8.3 16.4 16.9 17.8 18.0 17.2 16.0 10 0 0.0 9.2 000000 1019.5 0.0 0.0 2.4 25 8 20 02 02 97 20.6 75 26.0 12.2 9.8 16.9 17.2 18.0 18.0 17.6 16.1 10 0 0.0 6.6 000000 1020.0 0.0 0.0 3.0 26 5 15 02 01 97 21.7 61 28.9 11.1 8.5 16.6 17.0 18.2 18.4 17.7 16.1 00 0 0.0 12.2 000000 1019.0 0.0 0.0 2.8 27 7 14 02 03 97 25.3 59 28.9 15.6 11.8 18.2 18.4 19.1 19.0 18.1 16.3 00 0 0.0 6.9 000000 1018.0 0.0 0.0 3.3 28 0 09 02 02 97 26.0 64 30.6 15.1 11.4 18.8 19.0 19.8 19.4 18.5 16.5 00 0 0.0 11.1 000000 1022.0 0.0 0.0 3.7 29 7 00 00 02 97 24.0 55 31.5 17.9 13.8 20.1 20.4 20.6 20.2 19.0 16.7 00 0 0.0 9.3 000000 1022.5 0.0 0.0 4.2 30 4 23 05 02 96 23.7 62 28.9 16.5 12.9 19.7 20.2 20.9 20.5 19.4 17.0 90 0 0.0 8.7 000000 1023.0 0.0 0.0 2.9 31 0 29 05 02 06 24.4 64 27.2 16.0 13.5 19.7 20.3 21.2 20.9 19.7 17.1 90 0 0.0 6.1 000000 1022.5 0.0 0.0 3.0 Monthly means 19.9 68 24.1 13.5 11.2 17.5 17.7 18.5 18.4 17.9 16.3 1014.4 Monthly totals 44.7 191.9 21.6 0.0 76.1 Highest values 26.0 31.5 19.2 17.3 20.6 20.9 21.4 20.9 19.7 17.1 11.8 13.1 8.2 0.0 4.4 Lowest values 13.0 49 17.3 7.7 5.9 14.1 14.7 16.0 16.5 16.4 15.8 1971-2000 monthly climatological averages 74 22.7 13.0 11.0 16.3 16.8 17.7 17.5 16.6 15.3 39.7 193.4 1017.1 29.5 0.0 78.5 Number of days with 2001 normal Snow/sleet falling 0 0.0 50% snow cover 09GMT 0 0.0 Hail or ice pellets 0 0.2 Thunder 3 2.0 Gale 0 0.0 Fog at 09GMT 0 0.0 Air frost 0 0.0 Ground frost 0 0.0 0.2mm precipitation 9 10.7 1.0mm precipitation 9 7.5 5.0mm precipitation 3 2.3 No sunshine 1 1.5 Wetter than average, despite few rain days. Maidenhead missed most of the month's rains. Warm at the beginning and at the end, but a cool spell mid-month. Many days with little sunshine. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 01 cloud decreasing 02 sky not changing 03 cloud increasing VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (00 dry, 10 moist, 20 wet, 90 cracked) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR August 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 7 27 02 03 97 19.4 61 26.8 16.5 13.5 19.8 20.2 20.9 20.5 19.7 17.4 90 0 tr 7.2 000000 1025.5 0.0 0.0 4.1 02 8 18 02 60 97 18.1 84 21.1 13.9 11.1 18.7 19.2 20.2 20.3 19.8 17.5 90 0 22.1 0.0 000000 1014.0 6.0 0.0 0.7 03 6 36 02 11 09 17.0 91 23.0 13.9 12.7 17.6 18.3 19.1 19.4 19.1 17.6 10 0 1.3 3.0 000000 1010.5 0.9 0.0 1.7 04 1 27 02 02 97 19.3 64 22.3 10.9 8.6 18.1 17.3 18.2 18.7 18.6 17.5 10 0 23.4 6.9 000000 1015.5 5.8 0.0 1.7 05 7 25 05 02 96 16.5 73 23.6 11.4 9.4 16.6 16.8 17.9 18.6 18.5 17.4 10 0 2.4 10.3 000000 1016.0 0.6 0.0 3.3 06 8 00 00 02 97 17.3 92 23.3 13.5 14.1 17.6 17.8 18.6 18.9 18.4 17.4 10 0 0.8 4.0 000000 1010.0 0.3 0.0 1.6 07 6 18 02 02 97 17.0 83 20.8 13.2 11.0 15.9 16.7 17.9 18.6 18.3 17.3 10 0 1.3 0.6 000000 1006.5 1.0 0.0 0.6 08 8 20 02 02 97 18.0 81 21.5 13.1 11.5 15.6 16.2 17.4 18.1 18.0 17.2 10 0 0.4 7.9 000100 1008.0 0.3 0.0 1.5 09 7 17 02 02 97 15.8 81 16.4 11.2 8.9 15.0 15.7 17.1 18.1 17.8 17.1 10 0 40.5 0.1 000100 1010.0 6.8 0.0 0.4 10 0 30 09 02 97 16.4 75 20.3 8.7 6.9 12.2 13.2 15.0 16.6 17.0 17.0 10 0 0.0 11.2 000000 1025.0 0.0 0.0 1.8 11 7 27 02 02 97 17.0 65 21.4 9.8 7.5 14.9 15.0 16.0 17.0 16.9 16.7 10 0 0.8 3.5 000000 1027.0 1.3 0.0 1.9 12 8 23 05 60 97 17.0 92 19.9 16.1 14.3 16.9 16.8 17.1 17.1 16.9 16.6 10 0 2.1 0.1 000000 1018.5 2.9 0.0 1.1 13 8 24 05 02 97 18.5 85 26.2 16.5 15.1 16.9 17.1 17.4 17.4 16.9 16.6 10 0 0.0 6.3 000000 1014.5 0.0 0.0 1.7 14 8 30 02 02 97 20.0 80 26.7 16.9 15.2 18.1 18.3 18.6 18.1 17.4 16.5 10 0 tr 10.1 000000 1014.5 0.0 0.0 2.6 15 6 23 02 02 96 24.0 79 29.1 16.8 14.3 17.8 18.3 18.9 18.8 17.8 16.6 10 0 0.4 9.1 000000 1010.0 0.1 0.0 3.3 16 7 23 09 02 97 19.0 70 23.6 16.6 14.9 18.3 18.8 19.6 19.5 18.3 16.8 10 0 1.0 9.5 000000 1013.5 0.4 0.0 2.2 17 5 27 05 02 97 16.5 84 22.3 11.7 9.4 16.3 16.9 18.0 19.1 18.6 17.1 10 0 0.0 9.5 000000 1018.0 0.0 0.0 2.3 18 7 27 02 02 97 19.0 75 23.1 13.6 10.0 16.0 16.5 18.0 18.7 18.4 17.1 10 0 20.0 0.1 000000 1007.5 6.5 0.0 1.2 19 7 13 09 80 97 17.5 95 21.2 15.8 13.2 15.5 16.0 17.0 18.7 18.3 17.3 10 0 7.6 2.0 000000 1000.0 1.2 0.0 0.6 20 6 22 05 03 97 17.5 80 21.9 12.5 9.7 14.5 15.0 17.0 18.4 18.3 17.2 10 0 0.0 9.5 000000 1014.5 0.0 0.0 1.9 21 7 22 05 03 97 18.0 70 23.1 9.6 9.0 16.0 16.0 16.0 18.3 18.3 17.2 10 0 0.0 9.0 000000 1019.5 0.0 0.0 2.6 22 1 00 00 01 97 19.5 85 24.8 13.0 9.5 17.0 17.0 17.0 18.4 18.2 17.3 10 0 0.0 8.0 000000 1024.0 0.0 0.0 1.6 23 7 00 00 02 96 20.5 75 22.8 14.5 11.0 17.0 17.5 18.0 19.0 18.5 17.3 10 0 0.2 0.1 000000 1021.0 0.1 0.0 0.8 24 5 18 09 41 09 20.0 85 27.4 16.5 12.5 16.5 17.0 18.5 19.0 18.4 17.1 10 0 0.0 10.5 000000 1018.0 0.0 0.0 2.5 25 2 32 02 10 95 18.0 97 30.1 13.4 11.0 17.5 17.5 18.5 19.2 18.8 17.6 10 0 0.3 8.0 000000 1017.5 0.2 0.0 2.2 26 7 32 02 02 95 18.0 95 20.4 17.7 14.0 17.5 18.0 20.0 19.8 19.0 17.6 10 0 1.9 0.0 000100 1017.0 1.1 0.0 1.2 27 5 32 02 02 97 16.5 65 22.2 11.5 9.0 15.5 16.0 17.5 18.9 18.7 17.8 10 0 0.0 13.0 000000 1022.0 0.0 0.0 2.5 28 2 27 02 02 97 18.0 70 21.6 9.3 7.0 15.5 15.5 16.0 18.1 18.2 17.8 10 0 0.0 10.5 000000 1021.5 0.0 0.0 1.8 29 6 36 02 02 97 15.5 90 22.4 8.4 6.6 15.5 16.0 16.5 17.9 18.1 17.7 10 0 0.1 8.0 000000 1016.0 0.1 0.0 1.8 30 7 22 05 21 96 16.0 85 19.6 13.5 10.0 16.0 16.5 18.0 18.1 17.9 17.6 10 0 6.2 0.2 000100 1010.5 1.2 0.0 0.8 31 6 27 05 02 97 15.0 80 19.2 10.9 9.5 16.0 16.5 16.5 17.5 17.5 17.5 10 0 2.9 6.0 000100 1011.0 0.8 0.0 1.7 Monthly means 17.9 80 22.8 13.3 11.0 16.5 16.9 17.8 18.5 18.2 17.2 1015.4 Monthly totals 135.7 184.2 37.6 0.0 55.6 Highest values 24.0 30.1 17.7 15.2 19.8 20.2 20.9 20.5 19.8 17.8 40.5 13.0 6.8 0.0 4.1 Lowest values 15.0 61 16.4 8.4 6.6 12.2 13.2 15.0 16.6 16.9 16.5 1971-2000 monthly climatological averages 76 22.4 12.6 10.5 16.0 16.7 17.7 17.8 17.3 16.4 54.2 188.5 1016.8 32.1 0.0 78.7 Number of days with 2001 normal Snow/sleet falling 0 0.0 50% snow cover 09GMT 0 0.0 Hail or ice pellets 0 0.1 Thunder 5 2.0 Gale 0 0.0 Fog at 09GMT 0 0.3 Air frost 0 0.0 Ground frost 0 0.0 0.2mm precipitation 19 10.1 1.0mm precipitation 13 7.1 5.0mm precipitation 6 3.2 No sunshine 2 1.6 Maidenhead was much wetter than many stations in East Berkshire as we had several heavy falls of rain, which affected nearby Bucks and Oxon, but which missed much of the rest of the area to the south. It was the second wettest August locally since 1860. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 01 cloud decreasing, 02 sky not changing, 03 cloud increasing, 10 mist, 11 shallow fog patches, 21 recent rain, 41 fog, 60 intermittent slight rain, 80 light rain shower VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (00 dry, 10 moist, 20 wet, 90 cracked) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR September 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 3 27 05 02 97 15.0 73 20.3 9.8 7.0 16.0 15.5 15.5 17.1 17.2 17.0 10 0 0.0 8.5 000000 1019.5 0.0 0.0 1.0 02 8 27 05 60 96 18.0 88 21.9 15.0 12.0 16.5 17.0 17.5 17.6 17.2 17.0 10 0 6.2 2.0 000000 1015.0 3.7 0.0 0.8 03 6 20 05 02 97 15.5 87 20.5 13.2 12.0 16.3 16.7 17.4 17.7 17.3 16.9 10 0 1.7 4.5 000000 1014.0 1.1 0.0 1.3 04 6 32 09 02 97 15.0 66 18.4 11.3 10.2 14.9 15.6 16.9 17.6 17.3 16.9 10 0 0.0 9.7 000000 1017.0 0.0 0.0 2.0 05 1 36 02 02 97 14.6 84 20.4 6.5 4.7 12.1 13.1 15.2 17.0 17.1 16.9 10 0 1.5 2.0 000000 1023.0 1.1 0.0 1.1 06 7 32 09 02 97 16.0 67 19.4 13.8 12.0 16.1 16.4 16.9 16.9 16.8 16.7 10 0 0.0 7.5 000000 1018.0 0.0 0.0 1.7 07 8 33 05 02 97 16.8 87 20.6 10.8 8.4 13.9 14.5 15.9 16.9 16.8 16.6 10 0 0.7 4.8 000000 1019.5 2.5 0.0 2.2 08 8 36 05 21 96 15.6 81 18.1 11.6 10.7 15.6 15.9 16.4 16.9 16.7 16.5 10 0 0.0 6.7 000000 1015.0 0.0 0.0 2.6 09 2 35 05 02 97 14.0 64 16.2 7.5 5.9 11.8 12.7 14.4 16.1 16.5 16.4 00 0 0.1 9.1 000000 1019.0 0.1 0.0 2.4 10 1 36 02 02 97 14.1 71 17.9 8.1 5.4 11.6 12.6 14.2 15.5 16.2 16.3 10 0 0.0 7.0 000000 1021.5 0.0 0.0 1.8 11 5 27 02 03 97 15.8 81 17.8 7.9 5.9 13.6 13.6 14.5 14.3 15.8 16.1 00 0 0.0 0.2 000000 1020.0 0.0 0.0 1.3 12 7 29 02 02 97 14.5 84 18.3 11.6 9.9 13.9 14.3 15.0 15.5 15.7 16.0 00 0 1.8 1.6 000000 1018.5 1.1 0.0 1.5 13 2 31 02 02 97 13.8 82 16.6 9.6 7.4 12.4 13.4 14.6 15.5 15.6 15.8 10 0 3.3 4.0 000000 1007.0 1.8 0.0 1.3 14 8 24 05 02 97 13.6 73 18.6 11.3 7.6 12.7 12.9 14.1 15.0 15.5 15.8 10 0 0.1 8.9 000000 1014.0 0.1 0.0 1.8 15 2 30 05 02 97 15.3 69 17.9 10.1 7.8 12.7 13.3 14.5 15.3 15.4 15.7 10 0 0.0 9.0 000000 1014.5 0.0 0.0 2.5 16 1 35 09 02 97 14.5 65 17.5 9.1 6.2 11.7 12.2 13.7 15.0 15.4 15.6 00 0 0.4 8.2 000000 1019.5 0.4 0.0 2.6 17 0 36 09 02 97 12.0 76 13.6 8.3 6.3 11.1 11.9 13.5 14.7 15.2 15.5 10 0 0.6 4.3 000000 1022.5 1.0 0.0 1.4 18 8 36 09 02 97 13.0 91 14.2 10.7 9.6 12.6 12.9 13.5 14.4 15.0 15.4 10 0 4.2 0.0 000000 1017.5 8.0 0.0 0.7 19 8 31 13 50 96 12.2 88 14.4 11.8 10.1 12.9 13.1 13.9 14.2 14.6 15.3 10 0 2.4 0.0 000000 1008.5 4.9 0.0 0.5 20 2 33 02 02 96 14.4 90 17.8 11.5 9.3 12.7 12.9 13.6 14.1 14.5 15.1 10 0 0.0 4.0 000000 1015.0 0.0 0.0 1.2 21 3 32 02 02 96 14.6 89 16.8 9.4 6.2 12.2 12.6 13.6 14.3 14.6 15.0 10 0 0.0 4.3 000000 1020.0 0.0 0.0 1.1 22 7 00 00 02 95 14.2 91 17.8 5.6 4.5 11.5 11.0 12.8 14.2 14.5 14.9 10 0 0.0 5.0 000000 1019.0 0.0 0.0 1.4 23 8 00 00 02 96 13.4 95 16.2 7.0 4.0 11.4 11.3 13.0 14.1 14.5 14.8 10 0 1.0 0.3 000000 1016.0 0.5 0.0 0.8 24 7 02 05 02 97 14.3 80 16.0 10.5 7.7 12.6 12.8 13.5 14.0 14.3 14.7 10 0 2.0 2.2 000000 1014.0 1.2 0.0 0.5 25 8 00 00 44 08 9.9 95 16.1 5.9 4.4 11.0 11.4 12.7 13.9 14.2 14.6 10 0 0.0 3.5 000000 1017.0 0.0 0.0 0.5 26 7 35 02 10 94 12.7 95 17.0 7.0 4.7 11.1 11.5 12.5 13.5 14.0 14.6 10 0 5.8 0.1 000000 1016.5 6.0 0.0 0.5 27 7 18 02 02 97 17.0 95 18.0 12.7 9.2 13.3 13.4 13.7 13.7 13.7 14.4 10 0 tr 1.0 000000 1014.5 0.0 0.0 1.2 28 3 00 00 10 94 15.3 96 22.3 10.3 7.8 12.6 12.9 13.9 14.2 14.1 14.3 10 0 12.6 6.5 000000 1013.5 7.0 0.0 1.3 29 8 20 02 61 94 16.3 93 18.9 15.3 9.0 14.8 14.8 14.9 14.5 14.3 14.4 10 0 0.8 1.4 000000 1007.5 0.2 0.0 0.6 30 8 19 02 02 97 15.6 90 17.0 11.3 7.7 13.6 13.6 14.1 14.5 14.4 14.4 10 0 4.5 0.0 000000 1009.0 6.0 0.0 0.8 Monthly means 14.6 83 17.9 10.2 7.8 13.2 13.5 14.5 15.3 15.5 15.7 1016.2 Monthly totals 49.7 126.3 46.7 0.0 40.4 Highest values 18.0 22.3 15.3 12.0 16.5 17.0 17.5 17.7 17.3 17.0 12.6 9.7 8.0 0.0 2.6 Lowest values 9.9 64 13.6 5.6 4.0 11.0 11.0 12.5 13.5 13.7 14.3 1971-2000 monthly climatological averages 83 19.1 10.3 7.9 13.3 13.9 15.0 15.6 15.5 15.4 60.3 131.7 1016.4 41.2 0.0 46.2 Number of days with 2001 normal Snow/sleet falling 0 0.0 50% snow cover 09GMT 0 0.0 Hail or ice pellets 0 0.2 Thunder 0 1.2 Gale 0 0.2 Fog at 09GMT 0 0.4 Air frost 0 0.0 Ground frost 0 0.3 0.2mm precipitation 16 12.5 1.0mm precipitation 12 9.1 5.0mm precipitation 3 3.7 No sunshine 3 2.9 A cool month overall, due to a high frequency of days with cloud and winds from a northerly quarter. Surprisingly, the hottest day came very late in the month. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 44 fog 3 cloud increasing 50 intermittent slight drizzle 10 mist 60 intermittent slight rain 21 recent rain 61 continuous slight rain VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (00 dry, 10 moist, 20 wet, 90 cracked) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMT This information (and data for earlier months) is also available at http://www.met.reading.a.uk/~bruggeReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR OCTOBER 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 7 23 05 02 97 16.1 91 18.5 14.0 11.3 13.8 14.3 14.8 14.6 14.4 14.5 10 0 11.5 2.3 000000 1000.0 5.5 0.0 1.8 02 8 22 02 63 95 13.0 80 17.6 12.8 12.1 13.6 13.8 14.5 14.8 14.5 14.5 10 0 0.4 4.3 000000 1000.0 0.5 0.0 0.9 03 1 17 02 01 97 16.0 85 19.3 10.2 6.4 11.7 12.7 13.9 14.5 14.5 14.5 10 0 0.7 8.7 000000 1010.0 0.2 0.0 1.3 04 6 20 02 03 97 14.6 84 18.4 10.5 6.5 11.9 12.4 13.4 14.5 14.4 14.5 10 0 0.1 4.0 000000 1014.0 0.1 0.0 1.4 05 7 20 02 02 97 17.0 79 20.0 14.0 12.5 13.8 13.9 14.4 14.5 14.3 14.5 10 0 0.7 5.4 000000 1007.5 0.9 0.0 1.8 06 0 18 05 02 97 17.1 83 18.2 12.0 9.2 12.8 13.3 14.3 14.7 14.5 14.5 10 0 3.9 4.5 000000 1004.0 2.8 0.0 1.4 07 8 20 05 60 96 13.4 91 15.1 11.4 7.9 12.8 12.9 14.0 14.5 14.5 14.5 10 0 13.8 0.5 000000 1000.0 5.9 0.0 1.0 08 5 25 13 02 97 13.1 84 16.1 11.6 9.1 11.6 12.1 13.0 14.0 14.2 14.5 10 0 2.4 2.9 000000 996.5 1.5 0.0 0.8 09 7 27 02 02 96 13.7 92 16.2 9.5 6.1 11.2 11.6 12.8 13.8 14.0 14.5 10 0 tr 4.0 000000 1008.0 0.0 0.0 0.9 10 2 00 00 02 96 12.0 96 16.5 6.5 3.2 9.9 10.7 12.6 13.6 13.8 14.4 10 0 0.2 0.8 000000 1022.0 0.5 0.0 1.0 11 8 22 05 02 96 15.5 95 18.0 12.0 13.4 14.0 14.0 14.0 13.8 13.7 14.2 10 0 tr 0.2 000000 1026.0 0.0 0.0 0.5 12 8 23 05 44 04 13.0 98 21.4 9.5 6.2 12.9 13.2 13.9 14.1 13.9 14.2 10 0 tr 7.3 000000 1023.5 0.0 0.0 0.8 13 6 21 02 41 08 15.3 94 22.8 11.4 9.5 13.9 13.2 14.0 14.2 14.0 14.2 10 0 tr 4.3 000000 1020.5 0.0 0.0 0.8 14 8 00 00 41 09 15.8 96 18.7 12.4 10.8 14.3 14.4 14.8 14.6 14.3 14.2 10 0 5.6 0.0 000000 1014.0 2.8 0.0 0.5 15 8 20 05 21 96 15.2 93 18.8 14.6 11.7 14.2 14.8 15.0 14.9 14.5 14.3 10 0 3.0 1.3 000000 1007.5 1.0 0.0 0.6 16 2 16 02 02 96 10.3 95 16.3 6.4 4.5 10.9 11.6 13.4 13.6 14.5 14.4 10 0 0.0 2.6 000000 1024.0 0.0 0.0 0.9 17 8 15 02 02 97 12.7 89 18.7 10.1 8.5 11.8 12.2 13.1 14.0 14.2 14.5 10 0 7.4 2.3 000000 1018.0 3.2 0.0 1.7 18 8 22 05 21 96 14.1 96 17.9 12.7 13.0 14.3 14.3 14.4 14.3 13.9 14.3 10 0 0.0 4.2 000100 1010.0 0.0 0.0 0.6 19 8 27 09 02 95 13.3 91 16.8 8.9 5.6 10.2 11.6 12.9 14.0 14.1 14.2 10 0 9.2 0.3 000000 1008.0 1.8 0.0 0.9 20 8 24 02 02 96 16.2 93 16.4 11.1 11.4 14.4 14.1 14.4 14.0 13.8 14.2 10 0 4.7 0.0 000100 1001.0 3.2 0.0 0.2 21 8 00 00 60 94 11.1 97 11.8 10.9 10.0 13.2 13.6 14.1 14.3 14.0 14.2 10 0 8.1 0.0 000000 1001.0 7.5 0.0 0.2 22 1 22 02 11 94 7.0 95 15.4 6.4 2.6 9.9 10.7 11.9 13.6 13.7 14.2 10 0 9.5 0.8 000000 1011.0 4.7 0.0 0.4 23 3 25 02 11 96 14.7 95 17.1 7.0 6.8 12.7 13.0 12.9 13.5 13.5 14.0 10 0 2.9 6.1 000000 1009.5 1.2 0.0 0.8 24 8 19 02 60 97 14.6 96 16.9 10.4 6.2 12.0 12.0 12.0 13.6 13.6 14.1 10 0 3.9 3.5 000000 1015.0 1.1 0.0 0.5 25 7 18 02 02 96 13.1 93 16.6 10.0 6.6 11.7 11.9 12.8 13.5 13.5 14.0 10 0 0.8 1.4 000100 1022.0 0.5 0.0 1.3 26 8 18 09 02 97 15.5 87 16.5 13.1 11.8 13.6 13.4 13.8 13.6 13.5 14.0 10 0 8.2 0.2 000000 1012.0 1.8 0.0 0.6 27 2 27 02 02 96 11.9 94 16.7 8.3 6.4 10.6 11.2 12.4 13.4 13.5 13.9 10 0 3.9 7.4 000000 1015.5 7.0 0.0 0.6 28 8 20 02 21 97 11.3 93 13.5 10.8 6.9 11.9 12.1 12.7 13.2 13.3 13.9 10 0 0.0 1.2 000000 1025.0 0.0 0.0 0.2 29 8 22 02 11 94 11.3 97 15.1 6.3 3.8 10.5 10.6 11.6 12.9 13.1 13.8 10 0 tr 1.2 000000 1026.5 0.0 0.0 0.7 30 9 00 00 45 06 13.0 95 18.6 11.3 7.3 11.1 11.3 11.2 12.8 12.9 13.6 10 0 1.0 7.4 000000 1017.0 0.3 0.0 1.4 31 6 30 09 02 97 11.5 71 13.4 9.3 5.9 10.6 11.1 12.3 13.0 13.0 13.6 10 0 0.0 6.4 000000 1020.5 0.0 0.0 1.1 Monthly means 13.6 91 17.2 10.5 8.2 12.3 12.6 13.4 13.9 13.9 14.2 1012.6 Monthly totals 101.9 95.5 54.0 0.0 27.6 Highest values 17.1 22.8 14.6 13.4 23.9 14.8 15.0 14.9 14.5 14.5 13.8 8.7 7.5 0.0 1.8 Lowest values 7.0 71 11.8 6.3 2.6 9.9 10.6 11.2 12.8 12.9 13.6 1971-2000 monthly climatological averages 88 15.0 7.3 4.9 9.9 10.5 11.5 12.2 12.6 13.2 68.7 100.4 1015.1 51.8 4.8 35.6 Number of days with 2001 normal Snow/sleet falling 0 0.0 50% snow cover 09GMT 0 0.0 Hail or ice pellets 0 0.2 Thunder 3 0.5 Gale 0 0.2 Fog at 09GMT 0 2.0 Air frost 0 0.8 Ground frost 0 4.5 0.2mm precipitation 21 14.0 1.0mm precipitation 16 11.4 5.0mm precipitation 8 4.6 No sunshine 3 6.6 An exceptionally mild month, with the mean minimum temperature being 3.2C above average. Overall, the month was 0.4C warmer than the mild October of 1995. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 1 cloud decreasing 41 fog 2 sky not changing 44 fog 3 cloud increasing 60 intermittent slight rain 11 shallow fog patches 63 continuous moderate rain 21 recent rain VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (00 dry, 10 moist, 20 wet, 90 cracked) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMT This information (and data for earlier months) is also available at http://www.met.reading.a.uk/~bruggeReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR NOVEMBER 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 1 28 02 02 97 7.6 95 14.1 2.9 0.0 7.3 8.3 10.3 12.3 12.7 13.5 10 0 0.0 8.0 000000 1039.5 0.0 0.0 0.9 02 2 27 02 10 95 6.4 98 14.2 2.2 -0.1 6.7 7.3 9.4 11.5 12.2 13.4 10 0 0.0 4.9 000000 1042.0 0.0 0.0 0.6 03 9 00 00 44 07 5.6 98 13.1 2.1 -0.2 6.6 7.2 9.0 11.0 11.7 13.1 10 0 0.1 5.9 000000 1035.5 0.1 0.0 0.3 04 8 00 00 44 08 9.8 96 11.5 5.4 5.0 9.2 9.2 9.7 10.7 11.3 12.9 10 0 0.2 3.9 000000 1027.0 0.3 0.0 0.5 05 1 32 02 41 94 5.9 96 12.0 1.3 -1.4 5.7 6.6 8.6 10.5 11.1 12.6 10 0 0.0 6.5 000000 1028.5 0.0 0.0 0.9 06 7 31 05 02 97 12.0 80 14.6 5.9 2.5 8.6 8.5 9.1 10.1 10.7 12.4 10 0 0.9 5.0 000000 1016.0 0.5 0.0 1.1 07 8 27 05 02 97 10.8 96 14.1 9.3 4.6 9.3 9.2 9.9 10.5 10.7 12.2 10 0 9.3 0.2 000000 1012.5 7.5 0.0 0.7 08 1 33 13 02 97 6.5 77 6.9 6.2 3.1 8.7 9.3 10.4 10.9 10.9 12.1 10 0 0.2 2.4 000000 1011.0 0.2 0.0 1.7 09 1 36 19 02 97 3.5 76 6.4 1.4 -1.2 3.9 4.9 7.1 9.8 10.5 12.1 10 0 0.0 6.2 505000 1025.0 0.0 0.0 1.2 10 5 34 02 02 97 2.6 83 9.5 -1.4 -4.0 3.8 4.3 6.2 8.6 9.7 11.8 10 0 0.0 6.9 000000 1032.5 0.0 3.0 0.6 11 8 31 02 02 97 8.6 92 13.1 2.6 5.0 7.2 6.8 7.5 8.5 9.3 11.5 10 0 0.0 0.1 000000 1028.0 0.0 0.0 0.4 12 8 00 00 02 96 8.3 95 11.4 7.5 3.6 8.0 7.9 8.7 9.1 9.4 11.2 10 0 2.0 0.0 000000 1017.0 3.0 0.0 0.6 13 8 36 13 02 97 5.5 77 7.4 5.4 4.0 7.2 7.6 8.7 9.4 9.6 11.1 10 0 0.0 3.5 000000 1025.5 0.0 0.0 1.5 14 0 31 02 02 97 0.3 90 8.3 -1.1 -3.9 3.4 4.3 6.3 8.6 9.3 11.0 10 0 0.0 6.8 000000 1035.0 0.0 3.7 0.9 15 4 00 00 02 97 -0.5 90 8.6 -1.5 -3.8 3.0 3.6 5.9 7.9 8.7 10.9 10 0 0.0 5.0 000000 1041.5 0.0 6.6 0.5 16 8 27 02 02 97 8.6 92 11.3 -0.5 0.5 6.8 6.4 6.9 7.7 8.3 10.6 10 0 0.0 0.0 000000 1041.5 0.0 0.0 0.6 17 8 04 05 50 95 9.0 96 9.7 8.6 7.5 8.0 7.6 8.2 8.5 8.6 10.4 10 0 tr 0.0 000000 1037.0 0.0 0.0 0.7 18 7 09 05 02 97 8.1 87 9.7 8.1 5.5 7.5 7.7 7.5 8.8 8.7 10.3 10 0 tr 0.2 000000 1028.0 0.0 0.0 0.7 19 8 03 02 02 96 7.3 80 9.7 7.0 6.0 7.4 7.5 8.3 8.8 8.8 10.2 10 0 0.0 1.0 000000 1022.5 0.0 0.0 0.9 20 8 07 02 02 96 4.9 87 10.1 2.0 0.5 6.2 6.3 7.5 8.6 8.8 10.3 10 0 0.0 0.2 000000 1032.0 0.0 0.0 0.6 21 8 23 09 02 97 10.1 89 12.5 4.9 5.2 7.3 7.2 7.7 8.4 8.7 10.1 10 0 2.5 0.0 000000 1030.0 2.0 0.0 1.0 22 8 27 05 21 97 9.7 90 11.2 9.1 7.6 9.4 9.2 8.7 9.0 8.9 10.1 10 0 0.0 2.5 000000 1022.5 0.0 0.0 1.4 23 6 31 02 02 97 0.6 88 11.3 -0.7 -3.6 4.2 4.7 7.5 8.6 8.9 10.1 10 0 0.0 0.2 000000 1030.0 0.0 4.8 0.4 24 7 30 02 02 97 9.3 96 14.4 0.6 5.9 7.2 7.2 7.5 8.2 8.6 10.1 10 0 0.5 2.4 000000 1025.0 0.3 0.0 0.6 25 8 27 05 02 97 11.4 94 14.0 8.9 4.8 8.4 8.2 8.6 8.7 8.7 10.0 10 0 4.8 0.0 000000 1018.5 3.3 0.0 0.2 26 1 36 02 02 96 0.4 98 7.6 0.0 -3.6 4.9 5.6 7.4 8.8 8.9 10.0 10 0 0.0 4.8 000000 1018.0 0.0 1.2 0.2 27 7 30 02 03 96 0.0 96 10.0 -1.5 -4.6 3.2 3.8 5.6 7.9 8.6 10.0 10 0 0.5 0.0 000000 1010.0 1.1 8.9 0.4 28 2 27 02 02 97 2.9 93 11.7 0.0 -2.5 3.9 4.4 6.1 7.5 8.0 9.8 10 0 4.9 1.7 000000 1018.0 3.2 0.0 0.5 29 8 21 09 02 97 11.7 95 13.5 2.9 5.5 7.8 7.8 6.6 7.6 7.8 9.6 10 0 6.6 0.0 000000 1013.5 7.0 0.0 0.3 30 8 22 05 02 96 13.5 94 14.7 11.5 9.6 10.2 9.9 9.5 8.6 8.4 9.5 10 0 4.1 0.0 000000 1009.5 4.0 0.0 0.5 Monthly means 6.7 90 11.2 3.6 1.9 6.7 7.0 8.0 9.2 9.6 11.1 1025.8 Monthly totals 36.6 78.3 32.5 28.2 21.4 Highest values 13.5 14.7 11.5 9.6 10.2 9.9 10.4 12.3 12.7 13.5 9.3 8.0 7.5 8.9 1.7 Lowest values -0.5 76 6.4 -1.5 -4.6 3.0 3.6 5.6 7.5 7.8 9.5 1971-2000 monthly climatological averages 90 10.6 4.0 1.7 6.4 6.8 7.8 8.7 9.1 10.5 61.0 62.1 1015.2 55.6 28.8 21.8 Number of days with 2001 normal Snow/sleet falling 1 0.5 50% snow cover 09GMT 0 0.0 Hail or ice pellets 1 0.2 Thunder 0 0.2 Gale 0 0.1 Fog at 09GMT 0 3.3 Air frost 6 5.4 Ground frost 11 11.5 0.2mm precipitation 12 13.7 1.0mm precipitation 7 10.4 5.0mm precipitation 2 4.9 No sunshine 8 10.1 Sunny during the first half of the month, then generally dull. Rainfall below average, with relatively high temperatures on the 29th and 30th. The 9th saw the first November snowfall since 1996. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 41 fog patches 3 cloud increasing 44 fog 10 mist 50 intermittent slight drizzle 21 recent rain VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (00 dry, 10 moist, 20 wet, 90 cracked) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
MAIDENHEAD METEOROLOGICAL OBSERVATIONS FOR DECEMBER 2001 0900GMT Temperature Soil temperatures (depth in cm) Rain Fr. Pch DD N dd ff ww VV Temp RH Max Min Gmin 5 10 20 30 50 100 E SS Rain Sun SLHTGF Press hrs hrs Evap 01 8 23 13 61 94 10.4 98 12.0 10.4 11.0 11.0 11.1 10.6 9.5 9.0 9.5 20 0 1.2 2.0 000000 1010.5 0.8 0.0 0.3 02 6 32 02 03 97 0.8 96 6.4 -0.2 -1.1 5.0 5.6 7.4 9.1 9.3 9.8 10 0 tr 0.0 000000 1028.0 0.0 0.5 0.3 03 9 00 00 45 03 6.1 98 10.7 0.8 4.1 6.8 6.7 8.0 8.5 8.8 9.9 10 0 10.4 0.7 000001 1023.5 4.2 0.0 0.2 04 1 27 02 02 97 9.2 88 11.7 6.1 5.0 7.4 7.9 7.4 8.5 8.6 9.8 10 0 6.1 3.5 000000 1010.0 2.7 0.0 0.7 05 8 22 05 60 95 10.5 95 14.5 5.7 1.5 6.7 7.1 7.5 8.4 8.6 9.7 10 0 0.7 2.6 000000 1011.0 0.7 0.0 1.4 06 6 33 02 02 97 3.2 96 7.5 2.9 -1.0 5.5 5.8 7.1 8.4 8.4 9.6 10 0 0.0 0.6 000000 1033.5 0.0 0.0 0.6 07 7 18 05 02 97 6.9 93 11.4 3.2 5.1 6.8 6.7 7.2 8.0 8.4 9.5 10 0 0.0 3.2 000000 1037.0 0.0 0.0 0.5 08 1 00 00 02 96 0.2 98 7.6 -0.7 -1.9 3.4 4.1 6.0 7.8 8.3 9.5 40 0 0.0 6.2 000000 1040.0 0.0 2.4 0.5 09 7 36 05 02 96 2.6 96 6.5 0.2 -3.4 9.2 9.5 5.6 7.0 7.6 9.4 10 0 0.0 4.0 000000 1040.5 0.0 0.0 0.4 10 9 00 00 45 04 3.0 98 8.1 0.7 -3.2 3.1 3.6 6.7 6.6 7.3 9.2 10 0 0.0 5.4 000001 1040.5 0.0 0.0 0.5 11 8 04 02 10 94 2.9 95 6.5 -0.2 -2.9 1.7 2.9 4.4 6.2 7.1 9.0 10 0 0.0 1.6 000001 1041.0 0.0 3.8 0.4 12 0 05 02 02 96 1.7 90 7.4 -2.0 -2.9 2.2 2.3 3.8 5.8 6.6 8.8 10 0 0.0 0.0 000000 1036.0 0.0 2.0 0.8 13 8 05 05 02 97 7.0 88 7.2 1.7 5.0 13.9 5.2 5.7 6.0 6.3 8.5 10 0 tr 0.0 000000 1035.5 0.0 0.0 0.6 14 0 09 02 02 97 -0.2 93 4.0 -0.5 -4.6 2.4 3.1 4.9 6.2 6.6 8.4 10 0 0.0 6.0 000000 1041.0 0.0 2.5 1.4 15 1 11 02 02 97 0.3 80 5.5 -0.6 -4.1 1.1 1.4 3.1 5.3 6.2 8.2 40 0 tr 4.6 000000 1041.0 0.0 1.5 1.8 16 8 09 09 02 97 4.0 80 4.7 0.3 0.6 3.3 3.3 4.1 5.1 5.7 8.0 10 0 0.0 0.0 000000 1039.5 0.0 0.0 1.2 17 0 36 02 02 97 -0.2 95 5.4 -0.4 -4.9 1.0 1.2 3.4 5.1 5.6 7.9 40 0 0.2 0.2 000000 1041.5 0.4 2.3 0.4 18 7 02 02 02 96 4.9 92 7.6 -0.2 1.6 3.1 3.3 4.2 5.2 5.6 7.7 10 0 0.0 1.9 000000 1040.0 0.0 2.3 0.4 19 8 03 02 02 96 0.6 98 6.0 -1.6 -4.2 2.1 2.1 3.5 5.0 5.5 7.4 40 0 0.2 3.5 000000 1035.5 0.3 7.2 0.4 20 0 36 02 02 97 0.0 95 4.8 -0.1 -4.0 2.0 2.4 3.9 5.0 5.4 7.4 40 0 0.0 5.3 000000 1034.5 0.0 5.8 0.4 21 8 36 09 02 97 4.6 86 8.0 -1.1 -4.5 1.9 1.7 2.9 4.5 5.1 7.3 10 0 0.2 0.1 000000 1018.0 0.3 2.1 1.1 22 6 34 05 02 97 -0.4 80 2.7 -1.7 -5.0 1.0 1.2 2.8 4.6 5.1 7.1 40 0 0.0 5.8 000000 1016.0 0.0 6.4 1.1 23 2 36 02 03 97 -3.0 94 5.4 -3.0 -6.8 0.5 0.6 2.1 4.0 4.7 7.1 40 0 0.3 6.2 000000 1024.5 0.6 15.5 0.6 24 6 27 09 01 97 5.2 95 9.0 -3.0 -5.4 0.7 0.6 1.9 3.5 4.2 6.9 10 0 1.2 0.5 000000 1013.5 1.3 0.0 1.1 25 8 33 05 61 96 5.7 92 6.1 5.2 4.4 4.8 4.4 4.4 4.4 4.5 6.6 10 0 1.6 0.0 000000 1000.5 2.4 3.0 0.6 26 0 36 05 02 97 -0.5 89 5.5 -1.2 -5.0 0.9 1.1 2.7 4.3 4.7 6.5 X5 <1 0.8 5.2 500000 1012.0 0.8 11.6 0.5 27 8 29 05 02 97 5.5 95 9.0 -1.3 -4.8 2.0 1.1 2.3 3.8 4.4 6.5 10 0 0.1 0.5 000000 1008.0 0.1 2.0 1.2 28 7 22 19 02 97 8.5 73 8.5 5.5 3.5 4.7 4.4 4.6 4.5 4.5 6.4 10 0 0.0 5.1 000000 1004.5 0.0 0.0 1.4 29 8 30 02 02 97 1.8 96 2.9 1.5 -2.2 2.7 2.6 3.5 4.4 4.7 6.4 10 0 0.0 0.0 000000 1003.0 0.0 6.9 1.0 30 1 27 05 02 97 1.0 85 4.0 -2.1 -6.9 0.5 1.1 2.5 3.8 4.5 6.3 40 0 0.0 4.0 000000 1012.0 0.0 12.2 1.1 31 0 32 02 02 97 -2.0 90 2.5 -2.2 -6.5 0.2 0.7 2.0 3.2 4.0 6.2 40 0 0.0 5.5 000000 1033.0 0.0 17.8 0.5 Monthly means 3.2 92 7.1 0.7 -1.4 3.8 3.7 4.7 5.9 6.3 8.1 1026.0 Monthly totals 23.0 84.2 14.6 107.8 23.4 Highest values 10.5 14.5 10.4 11.0 13.9 11.1 10.6 9.5 9.3 9.9 10.4 6.2 4.2 17.8 1.8 Lowest values -3.0 73 2.5 -3.0 -6.9 0.2 0.6 1.9 3.2 4.0 6.2 1971-2000 monthly climatological averages 90 8.3 2.6 0.4 4.6 4.8 5.7 6.3 6.7 8.1 65.6 40.9 1015.2 59.2 61.4 21.1 Number of days with 2001 normal Snow/sleet falling 1 1.7 50% snow cover 09GMT 0 1.0 Hail or ice pellets 0 0.3 Thunder 3 0.2 Gale 0 0.2 Fog at 09GMT 3 1.9 Air frost 18 7.9 Ground frost 21 15.3 0.2mm precipitation 11 15.1 1.0mm precipitation 5 11.2 5.0mm precipitation 2 4.9 No sunshine 6 14.7 A cold month (the coldest December since 1996) and dry. The most notable features were the frequent night frosts and the abundant sunshine. It was the sunniest December in Maidenhead for over 48 years. Key DD: date 07GMT observations N cloud cover (oktas, 9=obscured) dd wind direction (degrees/10) ff wind speed (knots) ww present weather code 2 sky not changing 45 fog 3 cloud increasing 60 intermittent slight rain 10 mist 61 continuous slight rain VV visibility (00-50 metres/100, 94 very poor, 95 poor, 96 moderate, 97 good) Soil temperatures are for 0700GMT beneath bare soil (5, 10, 20cm) or grass (30, 50, 100cm) 09GMT observations Temp temperature (degC) RH relative humidity (%) E state of ground (10 moist, 20 wet, 40 frozen, X5 snow) SS snow depth (cm) Press air pressure (mb) 24 hour readings Max maximum temperature (degC) beginning 09GMT Min minimum temperature (degC) ending 09GMT Gmin grass minimum temperature (degC) ending 09GMT Rain precipitation beginning 09GMT Sun sunshine (hours) sunrise-sunset Rain hrs hours of rainfall (>0.1mm/h) 09-09GMT Fr. Hrs hours of air frost (00-24GMT) Pch Evap Piche evaporation (ml) beginning 09GMT Days with S snow(5) or sleet(1) falling L 50% snow cover at 09GMT H hail or ice pellets T thunder heard G gale F fog at 09GMTReturn to top of document
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