Average annual temperature is 12.3 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -14.3 °C
Number of sunny days: 155 days
Number of rainy days: 202 days
Number of snow days: 8 days
Look at detailed online map of Stonington
* Weather data for Stonington 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) | 16.9 | 18.3 | 18.1 | 30.7 | 31.7 | 33.7 | 34.4 | 31.4 | 33.6 | 27.8 | 19.8 | 14.7 |
| Average daytime temperature (°C) | 7.2 | 9.0 | 9.7 | 19.1 | 22.2 | 25.9 | 29.9 | 27.5 | 24.2 | 18.6 | 10.4 | 8.1 |
| Average temperature (°C) | 3.6 | 3.0 | 4.2 | 12.5 | 15.2 | 19.8 | 24.2 | 22.2 | 19.0 | 13.7 | 5.5 | 4.3 |
| Average night temperature (°C) | 0.9 | -1.8 | -0.3 | 6.7 | 8.4 | 14.2 | 19.3 | 17.6 | 14.7 | 9.8 | 1.8 | 1.3 |
| Absolute minimum temperature (°C) | -5.2 | -14.3 | -6.1 | -1.1 | 2.4 | 8.3 | 15.4 | 13.8 | 9.5 | 2.3 | -5.3 | -3.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.4 | 6.6 | 7.0 | 8.7 | 11.5 | 10.9 | 11.9 | 10.6 | 8.8 | 7.6 | 7.2 | 4.0 |
| Precipitation (mm) | 101 | 39 | 79 | 102 | 22 | 96 | 157 | 134 | 157 | 75 | 48 | 112 |
| Sunny days | 9 | 11 | 10 | 15 | 20 | 10 | 8 | 8 | 17 | 17 | 18 | 12 |
| Rainy days | 20 | 15 | 20 | 15 | 11 | 20 | 23 | 23 | 13 | 14 | 11 | 17 |
| Snow days | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Stonington during the most sunny months:
The largest precipitation sum in Stonington is at