| Annual Summary 2009 | |||||||||||
| Month | Mean | Diff. | Maximum | Diff | Minimum | Diff | Hi Max | Low Min | Rain | % | Air Frost |
| JAN | 3.8 | -2.2 | 6.5 | -1.9 | 1.0 | -2.6 | 10.5 | -6.4 | 69.5 | 125 | 12 |
| FEB | 5.0 | -1.1 | 7.9 | -1.2 | 2.1 | -1.1 | 15.4 | -5.4 | 59.8 | 129 | 9 |
| MAR | 8.1 | 0.0 | 12.7 | 1.0 | 3.5 | -1.0 | 16.9 | -2.1 | 38.1 | 97 | 6 |
| APR | 11.4 | 1.5 | 16.0 | 1.7 | 6.7 | 1.3 | 20.8 | 0.6 | 28.4 | 53 | 0 |
| MAY | 13.6 | 0.1 | 18.3 | 0.1 | 8.9 | 0.2 | 24.6 | 3.3 | 28.9 | 62 | 0 |
| JUN | 16.7 | 0.5 | 21.8 | 0.9 | 11.6 | 0.2 | 29.7 | 5.8 | 33.4 | 68 | 0 |
| JUL | 17.8 | -0.7 | 22.1 | -1.2 | 13.5 | -0.1 | 28.9 | 10.7 | 62.5 | 144 | 0 |
| AUG | 18.3 | 0.0 | 23.2 | 0.0 | 13.4 | 0.0 | 28.4 | 8.5 | 35.7 | 67 | 0 |
| SEP | 15.7 | 0.3 | 20.0 | 0.1 | 11.4 | 0.4 | 27.2 | 6.0 | 23.6 | 41 | 0 |
| OCT | 12.3 | 0.4 | 16.1 | 0.5 | 8.5 | 0.3 | 19.8 | -0.8 | 34.8 | 50 | 1 |
| NOV | 9.8 | 1.8 | 12.3 | 1.3 | 7.3 | 2.3 | 16.8 | 1.0 | 161.2 | 253 | 0 |
| DEC | 4.3 | -1.5 | 6.6 | -1.5 | 2.0 | -1.6 | 12.5 | -5.4 | 79.3 | 132 | 10 |
| YEAR | 11.4 | -0.1 | 15.3 | 0.0 | 7.5 | -0.2 | 29.7 | -6.4 | 655.2 | 103 | 38 |
| Celsius | Fahrenheit | ..at 2100 GMT | Wind | Direction | |||||||
| Warmest | day | 29 Jun | 29.7 | 85.5 | Av. Pres. | SW | NW | NE | SE | ||
| Coldest | day | 10 Jan | -0.7 | 30.7 | Jan. | 1010.7 | 10 | 1 | 4 | 9 | |
| Coldest | night | 07 Jan | -6.4 | 20.5 | Feb. | 1014.0 | 6 | 6 | 1 | 2 | |
| Warmest | night | 03 Jul | 18.3 | 64.9 | March | 1014.6 | 13 | 8 | 2 | 2 | |
| April | 1012.5 | 8 | 3 | 7 | 6 | ||||||
| Ground frost | (Grass below 0C 32F) 74 | nights | May | 1017.6 | 17 | 1 | 5 | 3 | |||
| June | 1016.3 | 7 | 6 | 8 | 4 | ||||||
| Rain days | (0.2 mm | 0.01 in | or more) | 169 | July | 1011.4 | 19 | 3 | 0 | 2 | |
| Wet days | (1.0 mm | 0.04 in | or more) | 106 | August | 1014.8 | 17 | 4 | 0 | 4 | |
| Sep. | 1021.1 | 8 | 3 | 9 | 2 | ||||||
| Wettest | day | 13 Nov | 27.9 | 1.10 in | October | 1015.6 | 7 | 5 | 2 | 5 | |
| Nov. | 1000.7 | 17 | 2 | 1 | 6 | ||||||
| Days with | sleet or | snow | falling | 19 | Dec. | 1004.7 | 12 | 3 | 8 | 3 | |
| Days with | snow | lying | 9 | ||||||||
| Year | 1012.8 | 141 | 45 | 47 | 48 | ||||||
| Days with | hail | 9 | |||||||||
| Days with | thunder | 13 | Highest | press. | 1036mb | 17 | Mar and | 10 Sep | |||
| Lowest | press. | 979 mb | 09 | Feb | |||||||
| Days with | fog at | 0900 GMT | 2 | ||||||||
| Totals | exclude | calm + | winds direct ftom N S etc. | ||||||||
| New | Station | Records | and | trivia | 2009 | ||||||
| January | July | ||||||||||
| Coldest since 1997 | Highest number of rain days (20) since records began | ||||||||||
| Monthly maximum (10.5) lowest since records began | Lowest number of NE Winds (0) since records began | ||||||||||
| February | August | ||||||||||
| Wettest day on 9th (22.0) since records began | Driest since 2003 | ||||||||||
| Lowest pressure on 9th (979) since 1990 | Warmest since 2004 | ||||||||||
| March | September | ||||||||||
| Wettest day (3rd with 18.2) only 1.1 behind the record set in 2008 | Lowest number of rain days (4) since records began | ||||||||||
| Highest number of ground frosts since 2003 | Highest pressure on 10th (1036) since records began | ||||||||||
| April | October | ||||||||||
| 2nd Warmest since records began (behind 2007) | Lowest number of NE Winds (2) since 2001 | ||||||||||
| Highest number of SE Winds (6) since 2000 | Driest since 2003 | ||||||||||
| May | November | ||||||||||
| Highest number of SW Winds (17) since records began | Wettest since records began | ||||||||||
| Driest since 1998 | Highest number of thunder days (3) since records began | ||||||||||
| June | December | ||||||||||
| Lowest number of SW Winds (7) since 1995 | Lowest mean pressure (1004.7) since records began | ||||||||||
| Highest number of NE Winds (8) since 1995 | Coldest since 1996 | ||||||||||