| 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 | Minimum | Dew point | Ground | In ground under grass | Tipping Bucket | 20" | ||||||||||
| frosts* | 10 cm | 30 cm | 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 | ||||||||||||||||
| May | ||||||||||||||||
| June | ||||||||||||||||
| July | ||||||||||||||||
| August | ||||||||||||||||
| September | ||||||||||||||||
| October | ||||||||||||||||
| November | ||||||||||||||||
| December | ||||||||||||||||
| Year | 272.5 | (-5.96) | 9.6 | (+1.27) | 3.3 | (+1.35) | 4.8 | 38 | 5.5 | 7.3 | 209.3 | (+31.21) | 60 | 137.2 | 8.7 | |
| * 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 | ||||||||||||||||