Average annual temperature is 12.8 °C
Absolute maximum temperature: 35.8 °C
Absolute minimum temperature: -13.3 °C
Number of sunny days: 197 days
Number of rainy days: 159 days
Number of snow days: 9 days
Look at detailed online map of Vermilion County
* Weather data for Vermilion 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) | 18.4 | 17.8 | 19.9 | 27.0 | 32.1 | 33.2 | 35.5 | 35.8 | 31.9 | 28.8 | 24.2 | 15.5 |
| Average daytime temperature (°C) | 5.7 | 9.1 | 10.3 | 18.6 | 24.8 | 29.0 | 29.3 | 28.0 | 25.6 | 18.8 | 12.1 | 8.3 |
| Average temperature (°C) | 1.7 | 3.1 | 4.7 | 11.5 | 18.3 | 22.6 | 23.8 | 22.8 | 20.1 | 13.7 | 6.5 | 4.1 |
| Average night temperature (°C) | -1.1 | -1.1 | 0.2 | 5.9 | 12.1 | 16.5 | 18.8 | 18.4 | 15.4 | 9.6 | 2.2 | 1.2 |
| Absolute minimum temperature (°C) | -12.3 | -13.3 | -9.8 | -1.2 | 3.1 | 10.2 | 14.4 | 12.0 | 10.6 | -2.9 | -9.2 | -7.5 |
| 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 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.4 |
| 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) | 3.7 | 7.3 | 6.6 | 9.2 | 11.0 | 12.1 | 12.3 | 10.9 | 10.0 | 7.1 | 7.5 | 4.6 |
| Precipitation (mm) | 81 | 83 | 131 | 63 | 34 | 45 | 106 | 116 | 49 | 92 | 19 | 73 |
| Sunny days | 11 | 19 | 12 | 17 | 18 | 23 | 10 | 16 | 15 | 16 | 23 | 17 |
| Rainy days | 13 | 9 | 17 | 13 | 13 | 7 | 21 | 15 | 15 | 15 | 7 | 14 |
| Snow days | 7 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Vermilion County during the most sunny months:
The largest precipitation sum in Vermilion County is at