Average annual temperature is 10.4 °C
Absolute maximum temperature: 32.5 °C
Absolute minimum temperature: -20.9 °C
Number of sunny days: 149 days
Number of rainy days: 188 days
Number of snow days: 28 days
Look at detailed online map of Township of Williamstown
* Weather data for Township 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) | 10.6 | 12.7 | 16.5 | 26.3 | 31.2 | 32.5 | 32.5 | 31.0 | 31.9 | 28.8 | 16.8 | 14.4 |
| Average daytime temperature (°C) | 2.8 | 5.0 | 6.6 | 15.5 | 21.5 | 26.5 | 27.6 | 25.8 | 23.1 | 15.9 | 8.6 | 6.5 |
| Average temperature (°C) | -0.3 | -0.5 | 1.7 | 9.2 | 14.5 | 19.9 | 22.1 | 20.3 | 18.1 | 11.6 | 4.0 | 3.3 |
| Average night temperature (°C) | -2.8 | -4.2 | -2.1 | 4.0 | 8.1 | 14.1 | 17.2 | 15.6 | 13.8 | 8.3 | 0.1 | 1.0 |
| Absolute minimum temperature (°C) | -20.9 | -16.8 | -8.2 | -4.3 | 1.4 | 9.3 | 13.4 | 8.9 | 7.5 | -2.4 | -8.0 | -4.7 |
| 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) | 9.5 | 10.5 | 11.9 | 13.4 | 14.6 | 15.3 | 15.0 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| 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 | 9.0 |
| Sunshine mean duration (h) | 3.0 | 6.8 | 6.5 | 8.5 | 10.5 | 11.2 | 11.5 | 10.3 | 8.1 | 5.8 | 6.4 | 3.1 |
| Precipitation (mm) | 57 | 85 | 117 | 104 | 29 | 51 | 147 | 156 | 65 | 102 | 57 | 59 |
| Sunny days | 9 | 12 | 9 | 12 | 22 | 16 | 6 | 11 | 14 | 11 | 18 | 9 |
| Rainy days | 14 | 10 | 15 | 17 | 9 | 14 | 25 | 20 | 16 | 20 | 9 | 19 |
| Snow days | 8 | 6 | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
The best time to visit Township of Williamstown during the most sunny months:
Months with the longest average daylight duration in Township of Williamstown:
The largest precipitation sum in Township of Williamstown is at