| Weather Statistics for this Year | |||||
| Statistics recorded at Pitsford Hall from January 1 to | |||||
| November 21, 2009 | |||||
| Air Temperatures | |||||
| The Highest Maximum: | 30.0 | C | on | 30th | June |
| The Lowest Maximum: | 0.6 | C | on | 4th | January |
| The Highest Minimum: | 17.1 | C | on | 5th | August |
| The Lowest Minimum: | -5.5 | C | on | 6th | January |
| The Mean Maximum: | 15.0 | C | |||
| The Mean Minimum: | 7.0 | C | |||
| The Overall Mean: | 11.0 | C | |||
| Difference from the Yearly Mean: | 1.1 | C | |||
| Solar Radiation (from 1st May) | |||||
| Maximum (at 0900): | 784.0 | W/m^2 | on | 20th | June |
| Mean (at 0900): | 275.9 | W/m^2 | |||
| Relative Humidity: | |||||
| Highest Relative Humidity (at 0900): | n/a* | ||||
| Lowest Relative Humidity (at 0900): | 46.4 | % | on | 6th | July |
| Mean Relative Humidity (at 0900): | 83.4 | % | |||
| Dew Point: | |||||
| The Highest Dew Point (0900): | 18.4 | C | on | 3rd | July |
| The Lowest Dew Point (at 0900): | -6.0 | C | on | 6th | January |
| The Mean Dew Point (at 0900): | 7.9 | C | |||
| Rainfall: | |||||
| Total: | 424.0 | mm | |||
| Percentage of the Yearly Mean: | 70.6 | % | |||
| Duration: | 354.6 | hrs | |||
| Highest 24 hour fall (0900 to 0900): | 20.9 | mm | on | 9th | February |
| Rain Days (>/=0.2mm): | 128 | ||||
| Wet Days (>/=1.0mm): | 92 | ||||
| Sunshine: | |||||
| Total Duration of Bright Sunshine: | 1350.8 | hrs | |||
| Sunniest day: | 14 | hrs | on | 30th | May |
| No. of days without sunshine: | 42 | ||||
| Percentage of the Yearly Mean: | 83.2 | % | |||
| Cloud cover (mean at 0900): | 5.6 | oktas | |||
| Pressure (reduced to sea level): | |||||
| The Highest Pressure (at 0900): | 1038.8 | mb | on | 11th | September |
| The Lowest Pressure (at 0900): | 972.3 | mb | on | 23rd | January |
| Mean Pressure (at 0900): | 1014.6 | mb | |||
| Winds | |||||
| Run of wind (mean over 24 hrs): | 117.2 | miles | |||
| Mean daily wind speed: | 6.4 | mph | |||
| Run of wind (cumulative): | 37216 | miles | |||
| Highest Maximum Gust: | 50 | mph | on | 25th | March |
| No. of gusts of 50mph or more: | 1 | ||||
| Highest wind strength (at 0900): | 29 | mph | on | 19th | of this month |
| Mean wind strength (at 0900): | 8.9 | mph | |||
| Winds from the Following Directions: | |||||
| North | 4 | ||||
| North-north-east | 13 | ||||
| North-east | 9 | ||||
| East-north-east | 14 | ||||
| East | 8 | ||||
| East-south-east | 7 | ||||
| South-east | 17 | ||||
| South-south-east | 39 | ||||
| South | 34 | ||||
| South-south-west | 45 | ||||
| South-west | 9 | ||||
| West-south-west | 24 | ||||
| West | 12 | ||||
| West-north-west | 22 | ||||
| North-west | 21 | ||||
| North-north-west | 33 | ||||
| Calm | 13 | ||||
| Concrete | |||||
| Lowest Concrete Minimum: | -8 | C | on | 8th | January |
| Mean Concrete Minimum: | 6.4 | C | |||
| Evaporation | |||||
| Piche | 833.9 | ml | |||
| Days with: | |||||
| Thunder: | 11 | ||||
| Hail <5mm: | 2 | ||||
| Hail >/=5mm: | 1 | ||||
| Snow or snow & rain: | 14 | ||||
| Snow lying: | 19 | ||||
| Fog: | 14 | ||||
| Air Frost: | 28 | ||||
| Duration of Air Frost: | 203 | hrs | |||
| Gales: | 0 | ||||
| Evaporation (#2) | |||||
| Pan | 398.2 | mm | |||
| Wettest month: | 81.3 | mm | in | July | |
| Driest month: | 14.3 | mm | in | September | |
| Warmest month: | 17.1 | C~ | in | August | |
| Coolest month: | 3.0 | C~ | in | January | |
| Sunniest month: | 194.3 | hrs | in | May | |
| Dullest month: | 41.0 | hrs | in | January | |
| Windiest month: | 8.4 | mph~ | in | January | |
| Calmest month: | 4.4 | mph~ | in | June | |
| ~ averages | |||||
| *max relative humidity is not computed by | |||||
| this system | |||||