| ECN Rothamsted (ECN AWS T06 02, Harpenden) | ||||||||||||||||
| The Weather : Monthly Summary : 2026 | ||||||||||||||||
| (Departure from the 30 year means (1991 - 2020) in brackets) | ||||||||||||||||
| Sunshine | Mean Temperatures, °C | Rain | Drainage | Wind *** | ||||||||||||
| Maximum Air | Minimum Air | Dew point | Ground | Soil Temperature | (Tipping Bucket) | 20" | ||||||||||
| 10cm | 30cm | |||||||||||||||
| frosts* | under bare | under grass | Total | days** | Total | |||||||||||
| Hours | (hours) | °C | (°C) | °C | (°C) | °C | # | °C | °C | mm | (mm ) | # | mm | km/hr | ||
| January | 60.6 | (-3.26) | 6.9 | (-0.17) | 1.3 | (-0.25) | 2.9 | 18 | 3.8 | 5.9 | 97.9 | (+23.79) | 25 | 69.6 | 8.2 | |
| February | 52.0 | (-34.19) | 9.6 | (+1.99) | 5.0 | (+3.47) | 5.8 | 6 | 6.2 | 7.3 | 84.4 | (+27.43) | 22 | 59.0 | 9.3 | |
| March | 159.9 | (+31.49) | 12.3 | (+2.00) | 3.7 | (+0.82) | 5.6 | 14 | 6.6 | 8.6 | 27.1 | (-20.00) | 13 | 8.6 | 8.6 | |
| April | 241.7 | (+69.69) | 16.1 | (+2.68) | 4.6 | (+0.13) | 6.1 | 15 | 9.8 | 10.0 | 2.2 | (-51.81) | 5 | 0.0 | 8.8 | |
| May | 242.8 | (+39.46) | 19.7 | (+3.22) | 8.3 | (+1.02) | 9.5 | 9 | 14.3 | 12.8 | 22.9 | (-30.38) | 10 | 0.0 | 6.2 | |
| June | 230.0 | (+24.22) | 23.1 | (+3.55) | 12.9 | (+2.71) | 13.4 | 0 | 18.1 | 16.6 | 76.0 | (+21.20) | 16 | 13.1 | 7.4 | |
| July | 325.5 | (+118.69 | 27.0 | (+4.96) | 14.0 | (+1.66) | 12.9 | 0 | 21.4 | 18.9 | 1.6 | (-53.87) | 2 | 0.0 | 7.8 | |
| August | ||||||||||||||||
| September | ||||||||||||||||
| October | ||||||||||||||||
| November | ||||||||||||||||
| December | ||||||||||||||||
| Year | 1312.5 | (+246.09) | 16.4 | (+2.60) | 7.1 | (+1.37) | 8.0 | 62 | 11.4 | 11.4 | 312.0 | (-83.64) | 93 | 150.4 | 8.0 | |
| * Number of nights grass minimum was below 0.0 °C | ||||||||||||||||
| ** Number of days rain was 0.2 mm or more | ||||||||||||||||
| *** At 2 metres above the ground | ||||||||||||||||