Average annual temperature is 9.3 °C
Absolute maximum temperature: 31.8 °C
Absolute minimum temperature: -31.0 °C
Number of sunny days: 100 days
Number of rainy days: 231 days
Number of snow days: 34 days
Look at detailed online map of Town of Williamstown
* Weather data for Town of Williamstown 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) | 8.7 | 15.7 | 14.0 | 28.7 | 30.1 | 30.6 | 31.8 | 27.2 | 30.3 | 28.5 | 14.7 | 11.8 |
| Average daytime temperature (°C) | 2.4 | 3.9 | 4.5 | 15.9 | 19.2 | 23.5 | 26.4 | 23.4 | 22.1 | 16.0 | 6.9 | 5.6 |
| Average temperature (°C) | -1.2 | -2.1 | 0.1 | 9.2 | 12.8 | 18.1 | 21.4 | 18.9 | 17.1 | 11.9 | 2.8 | 2.3 |
| Average night temperature (°C) | -4.9 | -7.1 | -4.0 | 4.1 | 6.9 | 13.7 | 16.9 | 15.2 | 13.1 | 8.6 | -0.4 | -0.1 |
| Absolute minimum temperature (°C) | -15.5 | -31.0 | -11.4 | -6.1 | 0.0 | 7.9 | 13.0 | 10.1 | 7.3 | -1.2 | -8.7 | -8.3 |
| 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) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| 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 | 8.0 |
| Sunshine mean duration (h) | 2.4 | 4.6 | 5.6 | 8.3 | 11.4 | 10.6 | 11.0 | 10.0 | 9.3 | 5.3 | 4.7 | 2.4 |
| Precipitation (mm) | 154 | 95 | 114 | 124 | 82 | 187 | 153 | 178 | 58 | 156 | 122 | 167 |
| Sunny days | 5 | 4 | 7 | 12 | 20 | 6 | 5 | 5 | 14 | 7 | 6 | 9 |
| Rainy days | 17 | 14 | 16 | 18 | 11 | 24 | 26 | 26 | 16 | 24 | 20 | 19 |
| Snow days | 9 | 10 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 3 |
The best time to visit Town of Williamstown during the most sunny months:
Months with the longest average daylight duration in Town of Williamstown:
The largest precipitation sum in Town of Williamstown is at