Monthly Report for May 2009
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| Weather Summary | ||||
| Measure | Mean / Sum (anomaly) | Min | Max | Mean Time |
| Minimum Temperature | 8.9 °C (-0.1) | 4.8 °C | 12.9 °C | 06:55 |
| Maximum Temperature | 18.7 °C (+0.9) | 12.8 °C | 25.3 °C | 14:55 |
| Mean Temperature | 13.5 °C (+0.4) | 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 | 5.8 mph (+1.1) | 2.3 mph | 9.6 mph | |
| Maximum Wind Speed | n/a | n/a | n/a | |
| Maximum Gust | 23.9 mph | 13.0 mph | 34.0 mph | |
| Mean Wind Direction | n/a | n/a | n/a | |
| Rainfall | 26.3 mm (57%) | 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 | |
| Day Maximum (09-21) | 18.7 °C | 12.8 °C | 25.3 °C | |
| 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 | |
| Minimum Feels-like | n/a | n/a | n/a | |
| Maximum Feels-like | n/a | n/a | n/a | |
| Mean Feels-like | n/a | n/a | n/a | |
| Air-frost Hrs | 0 hrs | 0 hrs | 0 hrs | |
| Minimum PM2.5 | 0.0 µg/m3 | 0.0 µg/m3 | 0.0 µg/m3 | |
| Maximum PM2.5 | n/a | n/a | n/a | |
| Mean PM2.5 | n/a | n/a | n/a | |
| Temperature Range | 9.8 °C (+1.0) | 3.7 °C | 15.1 °C | |
| Humidity Range | 41% | 12% | 60% | |
| Pressure Range | 5 hPa | 2 hPa | 15 hPa | |
| Sun Hours | 194 (103%) [44%] | |||
| Wet Hours | 28 (70%) [3.8%] | |||
NB: Hover over a value to see how many days of data it is from. Sun hrs, Wet hrs, Cloud cover and Events are based on manual observation and 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 | 4 |
| > 20.0 mm | 0 | Min > 20.0 °C | 0 | > 95% max poss. | 1 | Total Events | 4 |
Misc.
Mean rainfall for days with >0.3mm: 3.3 mmTotal snowfall: 0.0 mm
Graphs and Charts
Mean Temperature
Variable
Measure
View more charts for this month
Intraday conditions
Per-minute readings across the month (downsampled for display). Choose a variable below.
Wind rose
Daily breakdown
Day numbers link to the detailed daily report. Wide tables can be scrolled horizontally.
Temperature, rain, sunshine & wind
| Day | Tmin | Tmax | Tmean | Rain | Hr max | 10m rain | Rate | Sun | Wmean | Wmax | Gust | Wdir | W10m |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 7.9 | 21.0 | 14.1 | 0.0 | - | - | - | 10 | 3.9 | - | 16.0 | - | - |
| 2 | 8.3 | 19.5 | 13.4 | 0.0 | - | - | - | 10 | 5.2 | - | 22.0 | - | - |
| 3 | 7.6 | 15.2 | 11.6 | 0.0 | - | - | - | 7 | 5.3 | - | 25.0 | - | - |
| 4 | 4.8 | 12.8 | 9.3 | 0.1 | - | - | - | 2 | 7.7 | - | 27.0 | - | - |
| 5 | 10.9 | 19.7 | 13.8 | 0.1 | - | - | - | 4 | 9.1 | - | 26.0 | - | - |
| 6 | 11.0 | 19.8 | 14.7 | 0.0 | - | - | - | 6 | 8.1 | - | 26.0 | - | - |
| 7 | 9.1 | 15.2 | 12.5 | 0.0 | - | - | - | 0.7 | 9.1 | - | 34.0 | - | - |
| 8 | 8.0 | 15.7 | 11.5 | 1.1 | 0.8 | 0.6 | 1.8 | 6 | 4.5 | - | 20.0 | - | - |
| 9 | 6.8 | 17.7 | 11.6 | 0.0 | - | - | - | 4 | 3.4 | - | 22.0 | - | - |
| 10 | 5.6 | 20.1 | 12.7 | 0.0 | - | - | - | 10 | 8.2 | - | 29.0 | - | - |
| 11 | 6.9 | 17.0 | 11.2 | 0.0 | - | - | - | 12 | 8.0 | - | 28.0 | - | - |
| 12 | 6.1 | 16.9 | 11.3 | 0.0 | - | - | - | 7 | 5.0 | - | 19.0 | - | - |
| 13 | 9.9 | 13.6 | 11.8 | 1.3 | 1.3 | 0.8 | 3.3 | 0 | 2.3 | - | 15.0 | - | - |
| 14 | 11.8 | 18.3 | 14.5 | 0.1 | - | - | - | 0.1 | 6.0 | - | 26.0 | - | - |
| 15 | 8.7 | 16.3 | 12.6 | 5.0 | 2.5 | 1.2 | 16 | 2 | 8.7 | - | 31.0 | - | - |
| 16 | 7.3 | 15.9 | 11.7 | 0.5 | 0.3 | 0.3 | - | 4 | 7.5 | - | 30.0 | - | - |
| 17 | 8.3 | 14.8 | 11.2 | 3.6 | 3.3 | 1.9 | 33 | 3 | 9.6 | - | 33.0 | - | - |
| 18 | 9.2 | 15.9 | 12.3 | 0.1 | - | - | - | 6 | 7.3 | - | 30.0 | - | - |
| 19 | 9.6 | 17.5 | 12.9 | 0.5 | 0.5 | 0.3 | 0.8 | 6 | 4.9 | - | 22.0 | - | - |
| 20 | 8.3 | 19.2 | 13.5 | 0.0 | - | - | - | 6 | 4.9 | - | 21.0 | - | - |
| 21 | 8.8 | 19.8 | 13.9 | 0.0 | - | - | - | 7 | 5.6 | - | 21.0 | - | - |
| 22 | 8.2 | 19.1 | 13.7 | 0.0 | - | - | - | 6 | 3.2 | - | 19.0 | - | - |
| 23 | 8.5 | 21.0 | 15.5 | 0.0 | - | - | - | 10 | 2.6 | - | 15.0 | - | - |
| 24 | 10.3 | 25.1 | 17.1 | 0.0 | - | - | - | 14 | 3.1 | - | 23.0 | - | - |
| 25 | 11.1 | 24.2 | 16.9 | 0.1 | - | - | - | 4 | 6.8 | - | 31.0 | - | - |
| 26 | 10.2 | 17.2 | 13.6 | 11.9 | 4.4 | 1.1 | 16 | 6 | 7.9 | - | 27.0 | - | - |
| 27 | 8.5 | 15.1 | 11.5 | 1.9 | 0.8 | 0.3 | 0.6 | 0 | 3.0 | - | 13.0 | - | - |
| 28 | 12.9 | 22.6 | 17.4 | 0.0 | - | - | - | 3 | 4.5 | - | 23.0 | - | - |
| 29 | 12.1 | 24.0 | 17.5 | 0.0 | - | - | - | 12 | 5.0 | - | 23.0 | - | - |
| 30 | 9.3 | 23.1 | 16.1 | 0.0 | - | - | - | 14 | 4.6 | - | 23.0 | - | - |
| 31 | 10.2 | 25.3 | 17.4 | 0.0 | - | - | - | 12 | 4.9 | - | 22.0 | - | - |
Humidity, dew point & pressure
| Day | Hmin | Hmax | Hmean | Dmin | Dmax | Dmean | Pmin | Pmax | Pmean |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 40 | 94 | 68 | 2.9 | 11.0 | 7.8 | 1021 | 1025 | 1023 |
| 2 | 35 | 88 | 63 | 3.3 | 8.0 | 5.9 | 1025 | 1029 | 1027 |
| 3 | 35 | 71 | 53 | -2.0 | 5.6 | 2.1 | 1025 | 1028 | 1026 |
| 4 | 51 | 80 | 64 | -2.2 | 7.6 | 2.6 | 1022 | 1028 | 1025 |
| 5 | 49 | 85 | 71 | 5.5 | 10.5 | 8.4 | 1018 | 1023 | 1020 |
| 6 | 45 | 81 | 67 | 6.4 | 10.2 | 8.4 | 1016 | 1019 | 1018 |
| 7 | 70 | 82 | 77 | 5.8 | 10.2 | 8.5 | 1011 | 1015 | 1013 |
| 8 | 41 | 83 | 65 | 2.2 | 8.5 | 4.8 | 1007 | 1017 | 1012 |
| 9 | 38 | 84 | 62 | 2.2 | 6.3 | 4.1 | 1015 | 1018 | 1016 |
| 10 | 37 | 87 | 62 | 2.0 | 8.7 | 5.1 | 1018 | 1022 | 1020 |
| 11 | 38 | 81 | 60 | 0.7 | 6.2 | 3.3 | 1021 | 1023 | 1022 |
| 12 | 34 | 74 | 60 | 0.9 | 7.3 | 3.4 | 1018 | 1023 | 1020 |
| 13 | 70 | 89 | 83 | 5.5 | 10.5 | 8.8 | 1011 | 1018 | 1014 |
| 14 | 66 | 93 | 82 | 9.7 | 12.6 | 11.4 | 1004 | 1011 | 1008 |
| 15 | 59 | 94 | 81 | 6.0 | 11.6 | 9.3 | 1000 | 1004 | 1002 |
| 16 | 50 | 94 | 72 | 3.4 | 10.8 | 6.5 | 1003 | 1010 | 1006 |
| 17 | 58 | 88 | 77 | 4.3 | 9.4 | 7.2 | 1005 | 1010 | 1008 |
| 18 | 53 | 89 | 73 | 5.3 | 8.9 | 7.3 | 1009 | 1018 | 1014 |
| 19 | 48 | 93 | 72 | 4.8 | 10.9 | 7.6 | 1016 | 1020 | 1018 |
| 20 | 44 | 92 | 68 | 5.2 | 9.5 | 7.2 | 1017 | 1021 | 1019 |
| 21 | 35 | 88 | 63 | 3.8 | 9.5 | 6.3 | 1012 | 1017 | 1014 |
| 22 | 45 | 84 | 63 | 4.9 | 8.2 | 6.5 | 1015 | 1019 | 1017 |
| 23 | 33 | 89 | 58 | 2.8 | 11.4 | 6.4 | 1015 | 1019 | 1017 |
| 24 | 33 | 75 | 56 | 5.4 | 10.3 | 7.7 | 1017 | 1020 | 1018 |
| 25 | 47 | 84 | 69 | 6.4 | 14.3 | 10.8 | 1010 | 1020 | 1015 |
| 26 | 38 | 94 | 69 | 1.8 | 15.0 | 7.6 | 1007 | 1022 | 1014 |
| 27 | 69 | 91 | 84 | 4.8 | 13.1 | 8.8 | 1019 | 1024 | 1022 |
| 28 | 54 | 94 | 77 | 11.8 | 14.2 | 13.0 | 1024 | 1032 | 1028 |
| 29 | 39 | 95 | 68 | 2.9 | 16.2 | 10.2 | 1029 | 1033 | 1031 |
| 30 | 30 | 90 | 59 | 4.5 | 11.9 | 7.2 | 1025 | 1028 | 1026 |
| 31 | 36 | 85 | 64 | 7.1 | 13.3 | 9.9 | 1024 | 1026 | 1025 |
Other measures
| Day | Night | Daymax | T+10m | T+1h | H+1h | T-10m | T-1h | H-1h | Fmin | Fmax | Fmean | AF hrs | AQmin | AQmax | AQmean |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 7.9 | 21.0 | 1.6 | 3.5 | 13 | 0.9 | 1.6 | 15 | - | - | - | 0 | - | - | - |
| 2 | 8.3 | 19.5 | 0.9 | 3.5 | 5 | 0.7 | 1.8 | 17 | - | - | - | 0 | - | - | - |
| 3 | 9.6 | 15.2 | 0.5 | 1.6 | 6 | 0.7 | 1.6 | 11 | - | - | - | 0 | - | - | - |
| 4 | 4.8 | 12.8 | 0.7 | 2.2 | 12 | 0.3 | 1.1 | 12 | - | - | - | 0 | - | - | - |
| 5 | 10.9 | 19.7 | 0.7 | 2.8 | 7 | 0.5 | 2.0 | 18 | - | - | - | 0 | - | - | - |
| 6 | 11.0 | 19.8 | 0.7 | 2.2 | 10 | 0.4 | 1.7 | 11 | - | - | - | 0 | - | - | - |
| 7 | 9.1 | 15.2 | 0.4 | 1.2 | 5 | 0.4 | 1.2 | 4 | - | - | - | 0 | - | - | - |
| 8 | 8.0 | 15.7 | 0.9 | 3.8 | 7 | 0.5 | 1.4 | 27 | - | - | - | 0 | - | - | - |
| 9 | 6.8 | 17.7 | 0.9 | 2.3 | 10 | 0.4 | 1.8 | 12 | - | - | - | 0 | - | - | - |
| 10 | 5.6 | 20.1 | 0.7 | 2.8 | 7 | 0.5 | 2.1 | 14 | - | - | - | 0 | - | - | - |
| 11 | 6.9 | 17.0 | 0.6 | 1.9 | 6 | 0.5 | 2.1 | 13 | - | - | - | 0 | - | - | - |
| 12 | 6.1 | 16.9 | 0.5 | 2.1 | 6 | 0.4 | 1.6 | 15 | - | - | - | 0 | - | - | - |
| 13 | 9.9 | 13.6 | 0.3 | 0.9 | 9 | 0.3 | 0.6 | 3 | - | - | - | 0 | - | - | - |
| 14 | 11.8 | 18.3 | 0.5 | 1.7 | 4 | 0.3 | 1.1 | 9 | - | - | - | 0 | - | - | - |
| 15 | 11.7 | 16.3 | 0.8 | 1.2 | 11 | 0.5 | 1.5 | 11 | - | - | - | 0 | - | - | - |
| 16 | 7.3 | 15.9 | 0.9 | 1.8 | 28 | 0.6 | 1.8 | 23 | - | - | - | 0 | - | - | - |
| 17 | 8.3 | 14.8 | 0.7 | 3.1 | 10 | 0.5 | 1.2 | 24 | - | - | - | 0 | - | - | - |
| 18 | 9.2 | 15.9 | 0.7 | 2.2 | 6 | 0.5 | 1.2 | 12 | - | - | - | 0 | - | - | - |
| 19 | 9.6 | 17.5 | 1.3 | 1.7 | 6 | 0.4 | 1.3 | 14 | - | - | - | 0 | - | - | - |
| 20 | 8.3 | 19.2 | 0.9 | 2.4 | 8 | 0.3 | 1.5 | 10 | - | - | - | 0 | - | - | - |
| 21 | 8.8 | 19.8 | - | - | - | - | - | - | - | - | - | 0 | - | - | - |
| 22 | 8.2 | 19.1 | 0.7 | 2.3 | 6 | 0.8 | 1.3 | 15 | - | - | - | 0 | - | - | - |
| 23 | 8.5 | 21.0 | 0.9 | 2.8 | 13 | 1.2 | 1.9 | 22 | - | - | - | 0 | - | - | - |
| 24 | 10.3 | 25.1 | 0.9 | 3.9 | 5 | 0.9 | 2.1 | 13 | - | - | - | 0 | - | - | - |
| 25 | 11.1 | 24.2 | 0.8 | 3.0 | 11 | 0.5 | 2.2 | 11 | - | - | - | 0 | - | - | - |
| 26 | 10.2 | 16.8 | 0.6 | 2.2 | 7 | 0.7 | 2.1 | 19 | - | - | - | 0 | - | - | - |
| 27 | 8.5 | 15.1 | 0.4 | 1.2 | 5 | 0.2 | 0.8 | 4 | - | - | - | 0 | - | - | - |
| 28 | 12.9 | 22.6 | 0.8 | 2.4 | 8 | 0.7 | 2.5 | 12 | - | - | - | 0 | - | - | - |
| 29 | 12.1 | 24.0 | 0.7 | 2.8 | 12 | 0.5 | 2.5 | 14 | - | - | - | 0 | - | - | - |
| 30 | 9.3 | 23.1 | 0.9 | 3.4 | 8 | 0.5 | 2.2 | 18 | - | - | - | 0 | - | - | - |
| 31 | 10.2 | 25.3 | - | - | - | - | - | - | - | - | - | 0 | - | - | - |