Monthly Weather Reports
Special note: Wind data not valid for this month (suspended 17th April - 28th July; replaced by METAR data from Heathrow)
NB: Everything below here is currently in development
Graph for this month not available (windtempraintrend42010.gif)
View daily breakdown
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Report for April 2010
Temperature | ||
| Measure | Value (anomaly) | Day |
| Lowest Temperature | 1.4 °C. | 1st |
| Highest Temperature | 21.6 °C. | 28th |
| Mean Temperature | 10.0 °C (+1.1) | . |
| Mean Minimum | 5.4 °C (+0.4) | . |
| Mean Maximum | 15.6 °C (+2.8) | . |
| Highest Minimum | 11.4 °C. | 29th |
| Lowest Maximum | 8.6 °C. | 1st |
| Coldest Day | 4.5 °C. | 1st |
| Warmest Day | 15.1 °C. | 28th |
Rainfall* | ||
| Measure | Value (anomaly) | Day |
| Total Rain | 21.4 mm (0%) | . |
| Wettest Day | 4.5 mm. | 2nd |
| Rain Days | 8. | . |
| Rain Days >1.0 mm | 5 (-5) | . |
| Mean Rain-day rain | 2.7 mm. | . |
Wind Speed | ||
| Measure | Value (anomaly) | Day |
| Mean Wind speed | 5.9 mph (+1.0) | . |
| Maximum Gust | 28.0 mph. | 30th |
| Maximum Speed | 18.4 mph. | 30th |
| Calmest Day | 2.0 mph. | 9th |
| Windiest Day | 13.1 mph. | 30th |
| Windy Days (>25 mph gusts) | 1. | . |
| Mean Direction | 248° (WSW). | . |
Relative Humidity | ||
| Measure | Value | Day |
| Lowest RH | 32%. | 24th |
| Highest RH | 94%. | 3rd |
| Mean RH | 66%. | . |
| Mean Minimum | 46%. | . |
| Mean Maximum | 84%. | . |
| Highest Minimum | 71%. | 2nd |
| Lowest Maximum | 70%. | 21st |
| Lowest Mean | 51%. | 24th |
| Highest Mean | 81%. | 2nd |
Dew Point | ||
| Measure | Value | Day |
| Lowest Dew Point | -3.7 °C. | 1st |
| Highest Dew Point | 11.7 °C. | 26th |
| Mean Dew Point | 3.5 °C. | . |
| Mean Minimum | 0.7 °C. | . |
| Mean Maximum | 6.3 °C. | . |
| Highest Minimum | 6.4 °C. | 26th |
| Lowest Maximum | 0.7 °C. | 21st |
| Lowest Mean | -1.6 °C. | 21st |
| Highest Mean | 8.9 °C. | 29th |
Pressure | ||
| Measure | Value | Day |
| Lowest Pressure | 997 hPa. | 3rd |
| Highest Pressure | 1035 hPa. | 9th |
| Mean Pressure | 1019 hPa. | . |
*: Includes snowfall (if recorded), which is manually entered so may take a few days to appear for the current month. NB that rain rate and max in 1hr are incalculable for snow events.
**: Rain rates are manually checked and readjusted from software-given values (within a week or so), so may differ from those quoted during current rain events.
NB: Everything below here is currently in development
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Summary | ||||||||||||||
| Day | Temperature | Rainfall | Wind Speed | Rel Humidity | Dew Point | Pressure | ||||||||
| Min | Max | Avg | Total | Avg | Gust | Min | Max | Avg | Min | Max | Avg | Min | Max | |
| 1 | 1.4 | 8.6 | 4.5 | 2.2 | 6.4 | 25.0 | 44% | 83% | 73% | -3.7 | 2.7 | -0.1 | 999 | 1009 |
| 2 | 5.3 | 10.1 | 7.1 | 4.5 | 5.3 | 24.0 | 71% | 92% | 81% | 1.4 | 6.1 | 4.0 | 998 | 1008 |
| 3 | 3.6 | 12.1 | 7.4 | 4.4 | 4.4 | 14.0 | 54% | 94% | 77% | 2.1 | 5.7 | 3.4 | 997 | 1001 |
| 4 | 5.0 | 11.8 | 7.5 | 0.8 | 5.4 | 22.0 | 39% | 89% | 69% | -2.2 | 4.1 | 1.7 | 999 | 1020 |
| 5 | 3.7 | 13.4 | 8.4 | 0.0 | 6.3 | 23.0 | 55% | 82% | 70% | -1.2 | 6.4 | 3.2 | 1019 | 1023 |
| 6 | 7.3 | 16.4 | 11.8 | 0.0 | 5.2 | 21.0 | 41% | 80% | 60% | 2.0 | 5.7 | 3.9 | 1013 | 1022 |
| 7 | 8.1 | 11.1 | 9.5 | 0.9 | 2.9 | 14.0 | 55% | 85% | 75% | 2.3 | 7.5 | 5.2 | 1013 | 1026 |
| 8 | 3.8 | 16.9 | 9.9 | 0.0 | 2.6 | 12.0 | 41% | 84% | 63% | 0.8 | 4.5 | 2.8 | 1025 | 1033 |
| 9 | 5.0 | 17.6 | 11.6 | 0.0 | 2.0 | 10.0 | 42% | 82% | 61% | 1.3 | 7.0 | 4.0 | 1032 | 1035 |
| 10 | 6.1 | 17.2 | 11.1 | 0.0 | 3.4 | 15.0 | 46% | 85% | 65% | 1.4 | 7.0 | 4.4 | 1030 | 1035 |
| 11 | 5.1 | 14.1 | 8.9 | 0.0 | 6.3 | 21.0 | 45% | 81% | 63% | 0.1 | 3.9 | 1.9 | 1026 | 1031 |
| 12 | 5.7 | 13.4 | 8.7 | 0.0 | 6.9 | 23.0 | 54% | 79% | 70% | 1.7 | 5.8 | 3.4 | 1024 | 1028 |
| 13 | 4.0 | 15.1 | 8.5 | 0.0 | 7.4 | 23.0 | 42% | 90% | 69% | -0.6 | 4.9 | 2.6 | 1021 | 1025 |
| 14 | 5.9 | 12.5 | 8.1 | 0.0 | 5.5 | 15.0 | 54% | 81% | 70% | 0.3 | 5.6 | 2.8 | 1018 | 1023 |
| 15 | 4.1 | 13.7 | 8.1 | 0.0 | 6.6 | 21.0 | 50% | 88% | 71% | 0.9 | 5.2 | 2.9 | 1021 | 1025 |
| 16 | 4.8 | 14.7 | 8.6 | 0.0 | 5.1 | 17.0 | 46% | 85% | 67% | 0.4 | 4.2 | 2.6 | 1025 | 1028 |
| 17 | 2.4 | 17.5 | 9.1 | 0.0 | 2.5 | 0.0 | 34% | 94% | 67% | -0.1 | 6.3 | 2.4 | 1017 | 1028 |
| 18 | 3.5 | 19.5 | 11.0 | 0.0 | 4.3 | 16.0 | 34% | 83% | 59% | 0.0 | 6.1 | 2.5 | 1009 | 1019 |
| 19 | 7.3 | 16.1 | 10.6 | 0.0 | 6.9 | 0.0 | 53% | 79% | 67% | 1.4 | 7.3 | 4.6 | 1017 | 1020 |
| 20 | 4.8 | 14.6 | 9.5 | 0.0 | 8.3 | 13.0 | 39% | 82% | 57% | -3.0 | 4.3 | 0.9 | 1018 | 1023 |
| 21 | 2.6 | 13.8 | 7.9 | 0.0 | 7.0 | 10.0 | 36% | 70% | 52% | -3.7 | 0.7 | -1.6 | 1020 | 1023 |
| 22 | 2.3 | 14.9 | 8.3 | 0.0 | 5.5 | 10.0 | 37% | 83% | 59% | -3.6 | 2.4 | 0.2 | 1018 | 1023 |
| 23 | 2.5 | 18.0 | 9.8 | 0.0 | 5.0 | 14.0 | 35% | 77% | 53% | -3.5 | 3.5 | 0.1 | 1016 | 1019 |
| 24 | 3.4 | 21.3 | 12.1 | 0.0 | 6.3 | 12.0 | 32% | 71% | 51% | -2.0 | 6.0 | 1.7 | 1016 | 1021 |
| 25 | 10.3 | 19.1 | 13.2 | 0.9 | 8.4 | 15.0 | 54% | 80% | 67% | 2.5 | 11.1 | 7.1 | 1017 | 1024 |
| 26 | 8.3 | 17.6 | 12.8 | 0.0 | 8.4 | 14.0 | 54% | 92% | 75% | 6.4 | 11.7 | 8.2 | 1023 | 1029 |
| 27 | 7.0 | 20.8 | 14.1 | 0.0 | 6.7 | 25.0 | 44% | 87% | 64% | 3.8 | 10.4 | 6.9 | 1027 | 1030 |
| 28 | 8.3 | 21.6 | 15.1 | 0.0 | 8.3 | 25.0 | 39% | 86% | 60% | 4.7 | 10.5 | 6.9 | 1015 | 1027 |
| 29 | 11.4 | 18.7 | 14.9 | 3.3 | 5.8 | 14.0 | 58% | 84% | 68% | 5.8 | 11.6 | 8.9 | 1006 | 1015 |
| 30 | 7.8 | 14.5 | 11.8 | 4.4 | 13.1 | 28.0 | 59% | 91% | 78% | 5.9 | 10.8 | 8.0 | 1007 | 1011 |
Graph for this month not available (windtempraintrend42010.gif)