Monthly Report for May 2009

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Weather Summary
Measure Mean / Sum (anomaly) Min Max Mean Time
Minimum Temperature 8.9 °C (+0.6) 4.8 °C 12.9 °C 06:55
Maximum Temperature 18.7 °C (+2.0) 12.8 °C 25.3 °C 14:55
Mean Temperature 13.5 °C (+1.3) 9.3 °C 17.5 °C
Minimum Humidity 46% 30% 70% 14:42
Maximum Humidity 87% 71% 95% 09:21
Mean Humidity 68% 53% 84%
Minimum Pressure 1015 hPa 1000 hPa 1029 hPa 12:46
Maximum Pressure 1021 hPa 1004 hPa 1033 hPa 13:03
Mean Pressure 1018 hPa 1002 hPa 1031 hPa
Mean Wind Speed n/a (-4.7) n/a n/a
Maximum Wind Speed n/a n/a n/a n/a
Maximum Gust n/a n/a n/a n/a
Mean Wind Direction n/a n/a n/a
Rainfall 26.3 mm (52%) 0.0 mm 11.9 mm
Maximum Hourly Rain 1.7 mm 0.3 mm 4.4 mm 08:00
Maximum 10-min Rain 0.8 mm 0.3 mm 1.9 mm 09:38
Maximum Rain Rate 10 mm/h 0.6 mm/h 33 mm/h 07:41
Minimum Dew Point 4.1 °C -2.2 °C 11.8 °C 13:35
Maximum Dew Point 10.4 °C 5.6 °C 16.2 °C 11:24
Mean Dew Point 7.2 °C 2.1 °C 13.0 °C
Night Minimum (21-09) 9.1 °C 4.8 °C 12.9 °C n/a
Day Maximum (09-21) 18.7 °C 12.8 °C 25.3 °C n/a
Max 10m Temp Rise 0.8 °C 0.3 °C 1.6 °C 12:26
Max 1hr Temp Rise 2.4 °C 0.9 °C 3.9 °C 12:28
Max 1hr Hum Rise 9% 4% 28% 16:22
Max 10m Temp Fall 0.5 °C 0.2 °C 1.2 °C 12:53
Max 1hr Temp Fall 1.6 °C 0.6 °C 2.5 °C 15:02
Max 1hr Hum Fall 14% 3% 27% 13:04
Max 10m Wind Speed n/a n/a n/a n/a
Minimum Feels-like 0.0 °C 0.0 °C 0.0 °C n/a
Maximum Feels-like n/a n/a n/a n/a
Mean Feels-like n/a n/a n/a n/a
Air-frost Hrs 0 hrs 0 hrs 0 hrs n/a
Measure Mean / Sum (anomaly) Min Max
Temperature Range 9.8 °C (+1.4) 3.7 °C 15.1 °C
Humidity Range 41% 12% 60%
Pressure Range 5 hPa 2 hPa 15 hPa
Measure Sum (anom.) [% of max] Min Max
Sun Hours 194 (102%) [44%] 0 14.5
Wet Hours 28 (70%) [3.8%] 0 9

NB: Hover over a value to view the date it was recorded.
    Sun hrs, Wet hrs, Cloud cover and Events are based on manual equipment/observations. Consequently, their reliablity is questionable and they         are provided for interest only.

Days Of...
Rainfall Temperature Sunshine Other
> 0.0 mm 13 Min < -5.0 °C 0 > 0 hrs 29 Falling Snow 0
> 0.1 mm 8 Min < 0.0 °C 0 > 1 hrs 27 Lying Snow 0
> 0.3 mm 8 Mean < 0.0 °C 0 > 3 hrs 23 Hail 0
> 1.0 mm 6 Mean > 20.0 °C 0 > 5 hrs 19 Thunder 0
> 5.0 mm 1 Max > 25.0 °C 2 > 10 hrs 9 Dense Fog 0
> 10.0 mm 1 Max > 30.0 °C 0 > 25% max poss. 23 Gusts > 30mph
> 20.0 mm 0 Min > 20.0 °C 0 > 95% max poss. 1 Total Events 0

Misc.

Mean rainfall for days with >0.2mm: 3.3 mm
Total snowfall: 0 cm - 0% of the total precipitation
Total lying snow: 0 cm

Graphs and Charts

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