Average annual temperature is 10.8 °C
Absolute maximum temperature: 39.3 °C
Absolute minimum temperature: -23.6 °C
Number of sunny days: 217 days
Number of rainy days: 114 days
Number of snow days: 34 days
Look at detailed online map of Knox County
* Weather data for Knox 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) | 3.4 | 6.6 | 18.3 | 29.5 | 32.7 | 34.7 | 37.7 | 39.3 | 37.6 | 32.3 | 18.8 | 14.0 |
| Average daytime temperature (°C) | -2.9 | 0.3 | 6.7 | 16.5 | 25.6 | 29.6 | 30.5 | 30.8 | 27.5 | 17.0 | 11.4 | 5.3 |
| Average temperature (°C) | -6.1 | -4.8 | -0.4 | 9.7 | 19.0 | 23.8 | 24.2 | 24.6 | 21.4 | 11.7 | 5.4 | 0.6 |
| Average night temperature (°C) | -9.2 | -9.1 | -4.5 | 4.3 | 13.2 | 18.0 | 18.7 | 19.5 | 16.2 | 7.3 | 1.1 | -2.8 |
| Absolute minimum temperature (°C) | -22.5 | -23.6 | -11.6 | -5.9 | 2.0 | 10.1 | 11.7 | 13.9 | 8.9 | -7.2 | -7.4 | -11.1 |
| 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) | 9.5 | 10.6 | 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) | 4.7 | 7.2 | 7.3 | 10.0 | 11.5 | 12.7 | 12.2 | 11.2 | 10.2 | 7.3 | 7.1 | 5.6 |
| Precipitation (mm) | 86 | 30 | 38 | 23 | 45 | 58 | 77 | 67 | 44 | 124 | 13 | 52 |
| Sunny days | 18 | 18 | 20 | 17 | 14 | 15 | 15 | 20 | 21 | 17 | 22 | 20 |
| Rainy days | 3 | 4 | 4 | 10 | 17 | 15 | 16 | 11 | 9 | 13 | 4 | 8 |
| Snow days | 10 | 6 | 7 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 3 |
The best time to visit Knox County during the most sunny months:
Months with the longest average daylight duration in Knox County:
The largest precipitation sum in Knox County is at