Average annual temperature is 11.5 °C
Absolute maximum temperature: 35.2 °C
Absolute minimum temperature: -22.4 °C
Number of sunny days: 161 days
Number of rainy days: 196 days
Number of snow days: 8 days
Look at detailed online map of Willimantic
* Weather data for Willimantic 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) | 17.3 | 17.9 | 15.2 | 32.8 | 28.1 | 33.4 | 31.7 | 29.5 | 35.2 | 28.0 | 18.3 | 16.2 |
| Average daytime temperature (°C) | 7.0 | 6.5 | 9.0 | 17.5 | 21.3 | 24.8 | 28.5 | 25.7 | 23.2 | 18.8 | 9.8 | 8.4 |
| Average temperature (°C) | 3.1 | 1.5 | 3.8 | 11.1 | 14.7 | 18.5 | 23.3 | 20.9 | 18.5 | 13.6 | 4.7 | 4.0 |
| Average night temperature (°C) | -0.3 | -2.9 | -0.6 | 6.0 | 8.6 | 13.4 | 19.1 | 16.8 | 15.0 | 9.7 | 0.7 | 0.5 |
| Absolute minimum temperature (°C) | -5.4 | -22.4 | -5.3 | -3.1 | 2.2 | 6.7 | 14.4 | 12.6 | 7.9 | 3.1 | -5.1 | -6.6 |
| 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) | 9.5 | 10.6 | 11.9 | 13.3 | 14.5 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.1 | 6.5 | 7.4 | 8.6 | 12.0 | 10.1 | 10.9 | 9.6 | 7.4 | 8.0 | 7.2 | 5.4 |
| Precipitation (mm) | 177 | 53 | 112 | 98 | 64 | 80 | 215 | 194 | 235 | 78 | 51 | 212 |
| Sunny days | 7 | 15 | 15 | 16 | 20 | 6 | 7 | 9 | 14 | 12 | 22 | 18 |
| Rainy days | 19 | 11 | 15 | 14 | 11 | 24 | 24 | 22 | 16 | 19 | 8 | 13 |
| Snow days | 5 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Willimantic during the most sunny months:
The largest precipitation sum in Willimantic is at