Average annual temperature is 11.6 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -19.5 °C
Number of sunny days: 226 days
Number of rainy days: 119 days
Number of snow days: 20 days
Look at detailed online map of Williamson
* Weather data for Williamson 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) | 10.2 | 14.9 | 22.5 | 28.0 | 29.5 | 32.1 | 34.1 | 34.9 | 33.5 | 30.9 | 18.5 | 14.4 |
| Average daytime temperature (°C) | 1.6 | 5.4 | 8.5 | 17.4 | 24.4 | 28.6 | 28.5 | 28.3 | 26.6 | 18.1 | 10.8 | 6.8 |
| Average temperature (°C) | -2.7 | -1.0 | 2.2 | 10.4 | 18.0 | 22.8 | 23.3 | 23.4 | 20.8 | 13.0 | 5.4 | 2.3 |
| Average night temperature (°C) | -5.9 | -5.7 | -2.1 | 4.9 | 12.2 | 17.2 | 18.7 | 19.2 | 15.9 | 8.8 | 1.1 | -0.9 |
| Absolute minimum temperature (°C) | -18.5 | -19.5 | -12.8 | -5.3 | 2.5 | 8.9 | 12.7 | 13.0 | 10.5 | -5.0 | -9.7 | -5.7 |
| 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) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 5.1 | 7.5 | 7.3 | 9.5 | 11.4 | 12.5 | 11.8 | 11.4 | 10.7 | 7.9 | 7.1 | 5.0 |
| Precipitation (mm) | 37 | 49 | 42 | 41 | 33 | 99 | 102 | 76 | 23 | 46 | 8 | 47 |
| Sunny days | 18 | 18 | 17 | 18 | 19 | 18 | 19 | 17 | 21 | 17 | 23 | 21 |
| Rainy days | 6 | 8 | 10 | 10 | 12 | 12 | 12 | 14 | 9 | 13 | 6 | 7 |
| Snow days | 7 | 2 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3 |
The best time to visit Williamson during the most sunny months:
The largest precipitation sum in Williamson is at