Average annual temperature is 20.7 °C
Absolute maximum temperature: 38.7 °C
Absolute minimum temperature: -2.2 °C
Number of sunny days: 168 days
Number of rainy days: 197 days
Look at detailed online map of Decatur County
* Weather data for Decatur 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) | 25.6 | 28.8 | 30.3 | 31.8 | 34.6 | 34.8 | 35.3 | 38.7 | 34.0 | 30.7 | 26.9 | 24.8 |
| Average daytime temperature (°C) | 19.4 | 22.6 | 24.6 | 27.6 | 29.4 | 31.4 | 33.3 | 35.4 | 31.0 | 26.0 | 20.4 | 17.0 |
| Average temperature (°C) | 13.5 | 16.4 | 18.0 | 21.0 | 23.1 | 25.8 | 28.1 | 29.4 | 25.1 | 20.3 | 15.0 | 12.0 |
| Average night temperature (°C) | 8.7 | 12.0 | 12.8 | 15.2 | 17.5 | 21.2 | 23.9 | 24.5 | 20.4 | 15.2 | 10.5 | 7.9 |
| Absolute minimum temperature (°C) | -2.2 | 0.9 | 0.2 | 7.7 | 9.5 | 17.7 | 21.9 | 22.6 | 15.5 | 8.4 | 0.1 | 0.5 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.4 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 7.2 | 8.1 | 8.8 | 9.9 | 10.5 | 10.3 | 11.3 | 11.2 | 9.6 | 9.0 | 7.1 | 6.4 |
| Precipitation (mm) | 138 | 88 | 82 | 107 | 86 | 249 | 130 | 112 | 200 | 47 | 101 | 190 |
| Sunny days | 18 | 13 | 16 | 10 | 13 | 8 | 6 | 7 | 13 | 24 | 19 | 21 |
| Rainy days | 13 | 15 | 15 | 20 | 18 | 22 | 25 | 24 | 17 | 7 | 11 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Decatur County is at