Monthly Report for December 2011
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| Weather Summary | ||||
| Measure | Mean / Sum (anomaly) | Min | Max | Mean Time |
| Minimum Temperature | 4.3 °C (+0.7) | -1.3 °C | 10.6 °C | 12:35 |
| Maximum Temperature | 9.1 °C (+0.9) | 4.1 °C | 12.9 °C | 14:48 |
| Mean Temperature | 6.8 °C (+0.8) | 1.5 °C | 11.7 °C | |
| Minimum Humidity | 71% | 45% | 91% | 13:18 |
| Maximum Humidity | 90% | 77% | 98% | 12:49 |
| Mean Humidity | 81% | 66% | 94% | |
| Minimum Pressure | 1007 hPa | 980 hPa | 1031 hPa | 10:32 |
| Maximum Pressure | 1016 hPa | 995 hPa | 1035 hPa | 12:17 |
| Mean Pressure | 1011 hPa | 990 hPa | 1032 hPa | |
| Mean Wind Speed | 6.2 mph (+1.1) | 4.0 mph | 9.6 mph | |
| Maximum Wind Speed | 15.5 mph | 8.7 mph | 22.5 mph | n/a |
| Maximum Gust | 22.9 mph | 12.8 mph | 40.9 mph | 12:00 |
| Mean Wind Direction | SW | N | W | |
| Rainfall | 56.2 mm (99%) | 0.0 mm | 9.1 mm | |
| Maximum Hourly Rain | 1.6 mm | 0.3 mm | 5.3 mm | 15:30 |
| Maximum 10-min Rain | 0.8 mm | 0.3 mm | 3.0 mm | 16:02 |
| Maximum Rain Rate | 10 mm/h | 0.5 mm/h | 30 mm/h | 15:57 |
| Minimum Dew Point | 1.2 °C | -3.6 °C | 9.8 °C | 11:49 |
| Maximum Dew Point | 6.6 °C | 0.6 °C | 11.2 °C | 13:29 |
| Mean Dew Point | 3.7 °C | -1.0 °C | 10.3 °C | |
| Night Minimum (21-09) | 5.0 °C | -1.3 °C | 11.5 °C | 07:42 |
| Day Maximum (09-21) | 8.7 °C | 3.8 °C | 12.9 °C | 14:09 |
| Max 10m Temp Rise | 0.3 °C | 0.1 °C | 1.0 °C | 08:43 |
| Max 1hr Temp Rise | 1.0 °C | 0.3 °C | 1.8 °C | 10:07 |
| Max 1hr Hum Rise | 5% | 2% | 12% | 14:13 |
| Max 10m Temp Fall | 0.3 °C | 0.1 °C | 0.7 °C | 13:12 |
| Max 1hr Temp Fall | 0.9 °C | 0.3 °C | 2.4 °C | 15:40 |
| Max 1hr Hum Fall | 4% | 0% | 14% | 13:09 |
| Max 10m Wind Speed | 10.9 mph | 6.8 mph | 17.4 mph | 10:37 |
| Minimum Feels-like | 0.7 °C | -6.0 °C | 11.7 °C | 11:07 |
| Maximum Feels-like | 8.5 °C | 0.6 °C | 14.4 °C | 13:58 |
| Mean Feels-like | 5.0 °C | -2.5 °C | 13.1 °C | n/a |
| Air-frost Hrs | 6 hrs | 0 hrs | 4 hrs | n/a |
| Measure | Mean / Sum (anomaly) | Min | Max | |
| Temperature Range | 4.8 °C (+0.2) | 1.9 °C | 8.9 °C | |
| Humidity Range | 19% | 5% | 44% | |
| Pressure Range | 9 hPa | 2 hPa | 23 hPa | |
| Measure | Sum (anom.) [% of max] | Min | Max | |
| Sun Hours | 68 (105%) [31%] | 0 | 6.5 | |
| Wet Hours | 60 (97%) [8.1%] | 0 | 8 | |
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 (entered with a delay of 1-10 days).
Consequently, their reliablity is questionable and they are provided for interest only.
| Days Of... | |||||||
| Rainfall | Temperature | Sunshine | Other | ||||
| > 0.0 mm | 21 | Min < -5.0 °C | 0 | > 0 hrs | 25 | Falling Snow | 1 |
| > 0.1 mm | 21 | Min < 0.0 °C | 2 | > 1 hrs | 16 | Lying Snow | 0 |
| > 0.3 mm | 15 | Mean < 0.0 °C | 0 | > 3 hrs | 10 | Hail | 0 |
| > 1.0 mm | 11 | Mean > 20.0 °C | 0 | > 5 hrs | 5 | Thunder | 0 |
| > 5.0 mm | 4 | Max > 25.0 °C | 0 | > 10 hrs | 0 | Dense Fog | 0 |
| > 10.0 mm | 0 | Max > 30.0 °C | 0 | > 25% max poss. | 14 | Gusts > 30mph | 4 |
| > 20.0 mm | 0 | Ice Days | 0 | > 95% max poss. | 0 | Total Events | 5 |
Misc.
Mean rainfall for days with >0.3mm: 3.7 mmTotal snowfall: 0.5 cm - 1% of the total precipitation
Total lying snow: 0 cm