Average annual temperature is 11.1 °C
Absolute maximum temperature: 30.3 °C
Absolute minimum temperature: -4.6 °C
Number of sunny days: 132 days
Number of rainy days: 233 days
Look at detailed online map of Groton
* Weather data for Groton United Kingdom is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.0 | 14.8 | 14.9 | 15.2 | 18.9 | 29.1 | 26.0 | 25.6 | 30.3 | 23.4 | 14.2 | 13.5 |
| Average daytime temperature (°C) | 8.0 | 9.4 | 9.7 | 12.1 | 15.8 | 22.0 | 21.0 | 21.3 | 22.4 | 16.5 | 9.9 | 9.2 |
| Average temperature (°C) | 4.8 | 5.7 | 6.8 | 8.1 | 11.8 | 17.3 | 17.1 | 17.1 | 17.7 | 12.8 | 7.1 | 7.0 |
| Average night temperature (°C) | 1.6 | 2.5 | 3.7 | 4.2 | 7.7 | 12.2 | 13.1 | 12.9 | 13.4 | 9.6 | 4.3 | 4.2 |
| Absolute minimum temperature (°C) | -4.6 | -3.1 | -3.1 | -0.1 | 3.7 | 7.9 | 9.7 | 8.6 | 8.9 | 1.8 | -2.5 | -3.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.4 | 9.9 | 11.9 | 13.9 | 15.7 | 16.7 | 16.2 | 14.6 | 12.7 | 10.6 | 8.8 | 7.8 |
| Daylight minimum duration (h) | 7.0 | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 7.0 |
| Sunshine mean duration (h) | 4.1 | 5.0 | 4.5 | 9.0 | 10.5 | 12.2 | 10.4 | 10.5 | 9.1 | 5.6 | 4.1 | 2.7 |
| Precipitation (mm) | 45 | 7 | 101 | 68 | 43 | 50 | 94 | 64 | 51 | 96 | 71 | 82 |
| Sunny days | 14 | 16 | 2 | 8 | 14 | 18 | 5 | 8 | 16 | 10 | 10 | 11 |
| Rainy days | 17 | 12 | 29 | 22 | 17 | 12 | 26 | 23 | 14 | 21 | 20 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Groton during the most sunny months:
Months with the longest average daylight duration in Groton:
The largest precipitation sum in Groton is at