Average annual temperature is 9.7 °C
Absolute maximum temperature: 35.3 °C
Absolute minimum temperature: -27.2 °C
Number of sunny days: 191 days
Number of rainy days: 146 days
Number of snow days: 28 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) | 6.9 | 10.1 | 13.3 | 25.8 | 30.6 | 32.3 | 33.5 | 35.3 | 33.4 | 28.3 | 17.5 | 12.4 |
| Average daytime temperature (°C) | 0.5 | 1.7 | 5.0 | 13.9 | 21.9 | 27.2 | 28.5 | 26.9 | 23.9 | 15.4 | 7.5 | 4.9 |
| Average temperature (°C) | -3.0 | -3.4 | 0.0 | 8.0 | 14.9 | 20.7 | 22.7 | 21.5 | 18.7 | 11.3 | 3.1 | 1.4 |
| Average night temperature (°C) | -5.5 | -7.6 | -4.1 | 3.0 | 9.1 | 14.9 | 17.4 | 17.0 | 14.8 | 7.8 | -0.4 | -1.1 |
| Absolute minimum temperature (°C) | -27.2 | -23.8 | -15.4 | -4.2 | -0.1 | 6.4 | 12.9 | 9.6 | 8.5 | -2.7 | -12.3 | -8.1 |
| 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) | 3.7 | 6.6 | 6.7 | 7.8 | 10.7 | 12.5 | 12.6 | 11.3 | 8.8 | 6.6 | 6.7 | 4.1 |
| Precipitation (mm) | 38 | 77 | 84 | 128 | 41 | 51 | 66 | 132 | 72 | 95 | 41 | 40 |
| Sunny days | 12 | 16 | 10 | 17 | 19 | 22 | 13 | 15 | 13 | 16 | 23 | 15 |
| Rainy days | 10 | 8 | 13 | 13 | 12 | 8 | 18 | 16 | 17 | 13 | 6 | 12 |
| Snow days | 9 | 4 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 4 |
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