Average annual temperature is 19.9 °C
Absolute maximum temperature: 44.4 °C
Absolute minimum temperature: -9.0 °C
Number of sunny days: 242 days
Number of rainy days: 123 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) | 27.4 | 30.3 | 30.3 | 35.3 | 35.2 | 43.0 | 42.9 | 44.4 | 43.4 | 34.6 | 30.8 | 24.0 |
| Average daytime temperature (°C) | 16.3 | 17.4 | 21.4 | 26.1 | 29.4 | 34.6 | 38.2 | 40.6 | 35.4 | 26.5 | 19.7 | 16.1 |
| Average temperature (°C) | 9.2 | 8.9 | 13.7 | 18.2 | 22.9 | 27.4 | 31.9 | 34.0 | 28.9 | 19.9 | 13.0 | 9.7 |
| Average night temperature (°C) | 3.8 | 3.2 | 8.1 | 11.9 | 17.6 | 21.6 | 26.0 | 27.2 | 23.2 | 14.5 | 8.0 | 4.7 |
| Absolute minimum temperature (°C) | -9.0 | -5.4 | -1.5 | 5.9 | 11.1 | 16.7 | 21.9 | 22.5 | 17.7 | -1.7 | -1.8 | -1.9 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.6 | 7.0 | 9.7 | 10.4 | 10.7 | 11.8 | 12.4 | 12.3 | 10.5 | 8.9 | 7.8 | 7.7 |
| Precipitation (mm) | 20 | 37 | 58 | 49 | 76 | 93 | 31 | 5 | 9 | 94 | 16 | 74 |
| Sunny days | 23 | 16 | 19 | 19 | 14 | 12 | 21 | 28 | 20 | 23 | 23 | 24 |
| Rainy days | 8 | 12 | 12 | 11 | 17 | 18 | 10 | 3 | 10 | 8 | 7 | 7 |
| 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