Average annual temperature is 10.7 °C
Absolute maximum temperature: 33.0 °C
Absolute minimum temperature: -25.3 °C
Number of sunny days: 163 days
Number of rainy days: 188 days
Number of snow days: 14 days
Look at detailed online map of Town of Groton
* Weather data for Town of Groton United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 11.7 | 15.0 | 16.1 | 31.4 | 30.9 | 32.9 | 31.8 | 28.6 | 33.0 | 27.6 | 18.2 | 16.2 |
| Average daytime temperature (°C) | 5.3 | 5.4 | 7.5 | 15.8 | 21.3 | 23.6 | 27.9 | 25.5 | 22.8 | 18.5 | 8.9 | 7.6 |
| Average temperature (°C) | 1.3 | -0.3 | 2.4 | 9.6 | 14.5 | 17.8 | 22.9 | 20.5 | 18.1 | 13.5 | 3.8 | 3.0 |
| Average night temperature (°C) | -2.3 | -5.1 | -2.0 | 4.9 | 8.8 | 13.4 | 18.9 | 16.6 | 14.6 | 9.6 | 0.1 | -0.2 |
| Absolute minimum temperature (°C) | -11.7 | -25.3 | -8.1 | -3.5 | 2.0 | 7.0 | 13.8 | 12.5 | 7.0 | 1.5 | -5.3 | -6.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.3 | 15.0 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.2 | 6.3 | 7.2 | 8.2 | 11.3 | 8.8 | 10.2 | 9.3 | 7.2 | 7.2 | 7.0 | 5.4 |
| Precipitation (mm) | 172 | 54 | 138 | 87 | 76 | 154 | 186 | 152 | 189 | 111 | 38 | 154 |
| Sunny days | 8 | 12 | 16 | 16 | 19 | 6 | 7 | 11 | 12 | 17 | 22 | 17 |
| Rainy days | 17 | 11 | 13 | 14 | 12 | 24 | 24 | 20 | 18 | 14 | 7 | 14 |
| Snow days | 6 | 5 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Town of Groton during the most sunny months:
Months with the longest average daylight duration in Town of Groton:
The largest precipitation sum in Town of Groton is at