Average annual temperature is 12.8 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -14.1 °C
Number of sunny days: 201 days
Number of rainy days: 153 days
Number of snow days: 11 days
Look at detailed online map of De Witt County
* Weather data for De Witt 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) | 18.1 | 16.2 | 20.9 | 27.1 | 31.5 | 33.6 | 33.8 | 35.9 | 31.1 | 28.5 | 23.9 | 15.8 |
| Average daytime temperature (°C) | 5.6 | 8.5 | 10.3 | 18.6 | 25.0 | 29.3 | 28.8 | 27.6 | 25.1 | 18.5 | 11.8 | 8.1 |
| Average temperature (°C) | 1.2 | 2.6 | 4.7 | 11.7 | 18.6 | 23.2 | 23.8 | 22.9 | 20.1 | 13.7 | 6.4 | 4.1 |
| Average night temperature (°C) | -1.9 | -1.5 | 0.6 | 6.1 | 12.7 | 17.2 | 19.3 | 18.9 | 15.8 | 9.8 | 2.2 | 1.4 |
| Absolute minimum temperature (°C) | -13.7 | -14.1 | -10.4 | -1.0 | 3.2 | 10.9 | 15.1 | 12.1 | 10.8 | -2.2 | -9.6 | -7.6 |
| 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) | 3.9 | 7.3 | 6.6 | 9.6 | 10.9 | 12.7 | 12.4 | 10.6 | 9.7 | 7.3 | 7.6 | 4.7 |
| Precipitation (mm) | 67 | 80 | 123 | 79 | 34 | 31 | 103 | 148 | 61 | 84 | 23 | 81 |
| Sunny days | 12 | 17 | 14 | 17 | 19 | 20 | 13 | 13 | 19 | 17 | 23 | 17 |
| Rainy days | 11 | 9 | 16 | 13 | 12 | 10 | 18 | 18 | 11 | 14 | 7 | 14 |
| Snow days | 8 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit De Witt County during the most sunny months:
The largest precipitation sum in De Witt County is at