Average annual temperature is 11.5 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: -18.7 °C
Number of sunny days: 176 days
Number of rainy days: 176 days
Number of snow days: 13 days
Look at detailed online map of Will County
* Weather data for Will County 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) | 14.1 | 13.9 | 20.3 | 26.0 | 32.1 | 32.7 | 33.4 | 36.3 | 33.5 | 28.2 | 20.7 | 15.1 |
| Average daytime temperature (°C) | 3.7 | 6.6 | 8.6 | 17.1 | 23.1 | 28.1 | 28.6 | 27.3 | 24.5 | 17.3 | 10.4 | 7.1 |
| Average temperature (°C) | -0.1 | 0.9 | 3.1 | 10.1 | 16.4 | 21.2 | 22.9 | 22.0 | 19.4 | 12.8 | 5.1 | 3.5 |
| Average night temperature (°C) | -3.1 | -3.1 | -0.9 | 4.3 | 10.9 | 15.4 | 17.9 | 17.6 | 15.4 | 9.2 | 1.0 | 0.9 |
| Absolute minimum temperature (°C) | -17.2 | -18.7 | -11.6 | -3.5 | 1.5 | 8.3 | 14.4 | 12.1 | 9.9 | -2.9 | -10.4 | -7.9 |
| 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 | 9.2 |
| 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) | 3.2 | 7.6 | 6.3 | 9.2 | 10.5 | 12.1 | 11.6 | 10.6 | 8.0 | 6.4 | 7.2 | 4.1 |
| Precipitation (mm) | 60 | 90 | 126 | 84 | 67 | 45 | 136 | 127 | 111 | 167 | 42 | 75 |
| Sunny days | 9 | 17 | 9 | 15 | 20 | 19 | 14 | 14 | 11 | 11 | 23 | 14 |
| Rainy days | 14 | 9 | 22 | 15 | 11 | 11 | 17 | 17 | 19 | 20 | 6 | 15 |
| Snow days | 8 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Will County during the most sunny months:
The largest precipitation sum in Will County is at