Average annual temperature is 15.5 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -6.2 °C
Number of sunny days: 178 days
Number of rainy days: 187 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) | 19.8 | 24.0 | 24.0 | 28.9 | 29.6 | 33.2 | 35.6 | 36.9 | 32.6 | 28.7 | 26.0 | 19.0 |
| Average daytime temperature (°C) | 11.7 | 15.0 | 16.1 | 20.7 | 25.8 | 28.8 | 31.4 | 29.9 | 28.3 | 22.5 | 16.8 | 12.1 |
| Average temperature (°C) | 6.7 | 9.3 | 9.7 | 14.2 | 19.0 | 22.2 | 25.4 | 24.4 | 21.7 | 16.3 | 10.2 | 6.6 |
| Average night temperature (°C) | 3.3 | 4.9 | 4.5 | 8.5 | 13.3 | 16.5 | 20.5 | 19.8 | 16.5 | 11.0 | 5.3 | 2.6 |
| Absolute minimum temperature (°C) | -5.7 | -6.0 | -6.2 | 1.2 | 4.3 | 10.8 | 16.2 | 14.8 | 12.7 | 5.3 | -4.9 | -4.7 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.9 | 6.0 | 8.3 | 9.3 | 10.6 | 11.1 | 11.5 | 10.1 | 11.0 | 8.6 | 7.5 | 6.6 |
| Precipitation (mm) | 123 | 129 | 116 | 88 | 74 | 84 | 55 | 123 | 30 | 18 | 52 | 77 |
| Sunny days | 12 | 11 | 20 | 16 | 10 | 12 | 6 | 14 | 15 | 21 | 22 | 19 |
| Rainy days | 19 | 17 | 11 | 14 | 21 | 18 | 25 | 17 | 15 | 10 | 8 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Knox County during the most sunny months:
The largest precipitation sum in Knox County is at