| Pitsford Hall weather station - 1999 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Temperatures | ||||||||||||
| Mean Max (C) | 7.7 | 7.9 | 10.9 | 14.5 | 18 | 18.9 | 23.9 | 21.2 | 20.5 | 14.5 | 10.4 | 7.2 |
| Highest Max (C)(& date) | 12 (3,4,19) | 14.3 (19) | 18.2 (17) | 21.3 (30) | 24.5 (30) | 24.7 (26) | 29.5 (31) | 30.8 (1) | 28.1 (11) | 18.1 (10) | 16 (1) | 12.4 (24) |
| Lowest Max (C)(& date) | 2.8 (10) | 0.7 (5) | 4.2 (7) | 7.6 (13) | 13.4 (11) | 14.7 (11) | 16.3 (22) | 15.5 (10) | 13.4 (15) | 12.1 (5) | 5 (21) | 0.9 (19) |
| Mean Min (C) | 1.9 | 1.5 | 3.7 | 5.3 | 8.8 | 9.7 | 12.6 | 12.4 | 11.8 | 6.9 | 5 | 1.4 |
| Highest Min (C)(& date) | 6.4 (5) | 7.6 (3) | 9.5 (2) | 10.1 (6) | 12.2 (28) | 15 (27) | 17 (3) | 17.3 (3) | 14.3 (30) | 12.8 (10) | 10.5 (1) | 6.4 (7) |
| Lowest Min (C)(& date) | -3 (12,23) | -4.4 (9) | -1.4 (11) | -2.1 (14) | 6.2 (17) | 4.7 (8) | 8.1 (23) | 8 (17) | 8.9 (17) | 12.1 (5) | 0.6 (18) | -4.9 (20) |
| Mean Temp (C) | 4.8 | 4.7 | 7.3 | 9.9 | 13.4 | 14.3 | 18.3 | 16.8 | 16.2 | 10.7 | 7.7 | 4.3 |
| Days with Air Frost | 7 | 9 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
| Air Frost Duration (hrs) | 32 | 45 | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 76.5 |
| RH (%) | 94 | 88 | 84 | 86.2 | 82.4 | 84.1 | 81 | 86.8 | 89.8 | 88.8 | 86.6 | 87.5 |
| Rainfall | ||||||||||||
| Total (mm) | 77 | 20.5 | 30.4 | 68.4 | 90.4 | 63.3 | 12.2 | 99.9 | 74.2 | 53.4 | 23.5 | 79.5 |
| Rain Days | 19 | 11 | 14 | 18 | 15 | 14 | 4 | 16 | 17 | 9 | 14 | 20 |
| Wet Days | 15 | 10 | 9 | 11 | 12 | 8 | 4 | 14 | 12 | 8 | 8 | 14 |
| Wettest Day (& date) | 18.8 (19) | 3.1 (21, 26) | 5 (2) | 12.2 (26) | 17 (29) | 19.9 (1) | 4.7 (20) | 24.2 (25) | 22.9 (19) | 15.2 (1) | 6.7 (5) | 15 (10) |
| Duration (hrs) | 57.3 | 33.8 | 49.8 | 50 | 41.8 | 41.6 | 5.75 | 26.2 | 77.2 | 48.9 | 33.2 | 45 |
| Lowest Acidity (& date) | 6.06 (2, 13) | 6.2 (21) | 5.7 (6) | 5.7 (17) | 5.35 (6) | 5.5 (6) | 6.34 (2,4) | 5.6 (1) | 5.8 (15-17) | 6.2 (21) | 6.3 (19) | 5.41 (13) |
| Wind Directions | ||||||||||||
| North | 1 | 10 | 3 | 3 | 6 | 5 | 3 | 4 | 3 | 1 | 2 | 5 |
| North-East | 5 | 2 | 3 | 5 | 0 | 3 | 5 | 4 | 0 | 3 | 8 | 2 |
| East | 0 | 0 | 0 | 2 | 4 | 0 | 1 | 1 | 4 | 0 | 0 | 0 |
| South-East | 0 | 0 | 4 | 5 | 4 | 2 | 4 | 7 | 6 | 6 | 3 | 0 |
| South | 13 | 4 | 0 | 0 | 7 | 2 | 0 | 1 | 7 | 1 | 2 | 1 |
| South-West | 5 | 2 | 7 | 5 | 3 | 7 | 5 | 3 | 3 | 11 | 9 | 11 |
| West | 1 | 2 | 3 | 2 | 4 | 4 | 4 | 2 | 0 | 5 | 2 | 5 |
| North-West | 3 | 5 | 11 | 8 | 3 | 6 | 9 | 7 | 1 | 3 | 4 | 7 |
| Calm | 3 | 3 | 0 | 0 | 0 | 0 | 1 | 1 | 4 | 1 | 0 | 0 |
| Variable | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
| Wind Speeds (mph) | ||||||||||||
| Mean Over 24 hrs | _ | _ | 6 | 6.3 | 4.2 | 3.7 | 4.7 | 3.5 | 3.2 | 4.7 | 7.5 | 8.8 |
| Speed (0830 hrs) | _ | _ | 7.6 | 7.1 | 5.2 | 4.5 | 5.5 | 4 | 3.1 | 5 | 9.9 | 11.6 |
| Max Gust (& date) | 33 (1, 2) | 52 (22) | 48 (3) | 57 (13) | 43 (17) | 34 (20) | 35 (27) | 38 (14) | 29 (16) | 35 (31) | 48 (6) | 57 (24) |
| Pressure (mb) | ||||||||||||
| Mean at 0830 hrs | 1009 | 1016 | 1009 | 1011.5 | 1014.3 | 1014 | 1016.5 | 1013.6 | 1008.3 | 1013 | 1021.4 | 1007.8 |
| Max Pressure (& date) | 1039 (21) | 1034 (1) | 1027 (16) | 1026 (28) | 1022 (31) | 1025 (25) | 1026 (8) | 1025 (21) | 1028 (7) | 1031 (12) | 1041 (9) | 1028 (20) |
| Min Pressure (& date) | 987 (16) | 1000 (21) | 982 (3) | 992 (12,20) | 1005 (7) | 998 (27) | 1000 (20) | 995 (18) | 985 (20) | 975 (24) | 992 (5) | 978 (24) |
| Insolation | ||||||||||||
| Mean Cloud Cover (%) | 75 | 71 | 72 | 75 | 75 | 70 | 65 | 74 | 63.8 | 56.3 | 72.5 | 62.5 |
| Total Sunshine (hrs) | 29.1 | 63.7 | 106.8 | 154.8 | 146.2 | 173.5 | 233 | 156.8 | 161.9 | 93.4 | 39.7 | 34.6 |
| Sunniest Day (& date) | 3.8 (16) | 5.4 (9) | 8.9 (31) | 11.1 (27) | 10.5 (27) | 12.8 (18) | 12.6 (11) | 11.2 (28) | 11.7 (5) | 7.7 (2) | 4.9 (6) | 3.6 (29) |
| Sunless Days | 9 | 4 | 5 | 1 | 1 | 1 | 0 | 3 | 3 | 6 | 10 | 11 |
| Mean Visibility | 6 | 7 | 6 | 6 | 7 | 7 | 7 | 6 | 6 | 2 | 7 | 7 |
| Days with Fog (at 0830hrs) | 6 | 2 | 2 | 3 | 3 | 1 | 0 | 5 | 5 | 0 | 2 | 1 |
| Other Ppt | ||||||||||||
| Days with snow/sleet | 1 | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| Lying Snow (>50%) | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| Hail (< 0.5mm) | 0 | 1 | 0 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Hail (>/=0.5) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Other Obs | ||||||||||||
| Thunder heard* | 0 | 0 | 0 | 1 | 3 | 2 | 1 | 5 | 2 | 0 | 0 | 0 |
| Lightning seen | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 4 | 1 | 0 | 0 | 0 |
| Ground Obs | ||||||||||||
| Lowest Grass Min (& date) | _ | _ | _ | _ | 4.1 (29) | 3.2 (9) | 4.8 (15) | 4.5 (22) | 5.8 (8) | -1.4 (5) | -4 (18) | -8.8 (20) |
| Days with Ground Frost | 10 | 13 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 3 | 13 | 22 |
| Lowest Conc. Min (& date) | _ | _ | _ | _ | 5 (25) | 4.6 (8) | 7.7 (23) | 6.2 (22) | 7.4 (17) | 0 (15) | -2.1 (30) | -7.6 (19) |
| Soil Temps (C, means) | ||||||||||||
| Bare Earth | _ | _ | _ | _ | _ | _ | 17.7 | 16.7 | 14.3 | 8.5 | 6.4 | 2.8 |
| 5cm | _ | _ | _ | _ | 12.8 | 14.2 | 17.4 | 15.2 | 14 | 8.5 | 5.7 | 2.1 |
| 10cm | _ | _ | _ | _ | 13.2 | 14.7 | 17.8 | 16.4 | 15 | 9.8 | 6.9 | 3 |
| 20cm | _ | _ | _ | _ | 14.2 | 16 | 18.8 | 17.3 | 16 | 10.7 | 7.4 | 3.9 |
| 30cm | _ | _ | _ | _ | 14.5 | 16.3 | 19.4 | 18.1 | 16.6 | 11.4 | 8.1 | 4.4 |
| 40cm | _ | _ | _ | _ | _ | _ | 19.6 | 18.4 | 16.9 | 11.8 | 8.5 | 4.9 |
| 50cm | _ | _ | _ | _ | _ | _ | 19.6 | 18.6 | 17.2 | 12.4 | 9.2 | 5.6 |
| 100cm | _ | _ | _ | _ | _ | 18.5 | 17.9 | 16.7 | 13.2 | 10.4 | 7.2 | |