Average annual temperature is 13.8 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: -17.1 °C
Number of sunny days: 235 days
Number of rainy days: 116 days
Number of snow days: 14 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) | 20.3 | 22.0 | 24.9 | 31.3 | 33.2 | 37.8 | 38.2 | 37.6 | 37.0 | 29.8 | 28.4 | 22.1 |
| Average daytime temperature (°C) | 8.4 | 12.1 | 14.9 | 21.9 | 25.1 | 27.5 | 33.3 | 32.6 | 29.8 | 21.4 | 15.5 | 10.9 |
| Average temperature (°C) | 1.8 | 3.1 | 6.6 | 12.8 | 18.1 | 21.1 | 25.8 | 25.7 | 22.8 | 14.2 | 8.3 | 4.2 |
| Average night temperature (°C) | -2.8 | -3.0 | 0.7 | 6.3 | 12.4 | 15.6 | 19.2 | 19.5 | 16.8 | 8.3 | 3.0 | -0.4 |
| Absolute minimum temperature (°C) | -17.1 | -15.0 | -5.9 | -3.1 | 6.9 | 12.1 | 15.6 | 14.6 | 10.3 | -6.0 | -6.4 | -5.5 |
| 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 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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) | 7.6 | 8.7 | 9.5 | 10.6 | 10.1 | 11.6 | 12.2 | 11.7 | 10.5 | 9.6 | 8.1 | 7.3 |
| Precipitation (mm) | 20 | 19 | 6 | 43 | 83 | 78 | 161 | 16 | 25 | 21 | 3 | 28 |
| Sunny days | 21 | 21 | 22 | 21 | 10 | 8 | 15 | 24 | 22 | 25 | 25 | 21 |
| Rainy days | 7 | 3 | 7 | 8 | 21 | 22 | 16 | 7 | 8 | 6 | 4 | 7 |
| Snow days | 3 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
The largest precipitation sum in Stonington is at