Average annual temperature is 13.2 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -13.5 °C
Number of sunny days: 197 days
Number of rainy days: 159 days
Number of snow days: 9 days
Look at detailed online map of Decatur
* Weather data for Decatur 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) | 18.7 | 18.0 | 21.3 | 27.3 | 31.3 | 32.7 | 34.4 | 35.9 | 31.7 | 29.0 | 24.4 | 16.1 |
| Average daytime temperature (°C) | 6.2 | 9.1 | 10.8 | 18.9 | 24.8 | 28.9 | 29.2 | 28.1 | 25.7 | 18.8 | 12.3 | 8.4 |
| Average temperature (°C) | 1.8 | 3.3 | 5.3 | 12.1 | 18.7 | 23.0 | 24.3 | 23.3 | 20.6 | 14.1 | 7.0 | 4.5 |
| Average night temperature (°C) | -1.2 | -1.0 | 1.0 | 6.7 | 12.7 | 17.3 | 19.7 | 19.2 | 16.2 | 10.3 | 2.6 | 1.8 |
| Absolute minimum temperature (°C) | -13.2 | -13.5 | -9.5 | -1.2 | 4.0 | 11.6 | 15.8 | 12.4 | 11.2 | -2.2 | -9.0 | -7.2 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 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) | 4.3 | 7.4 | 6.5 | 10.0 | 11.2 | 12.8 | 12.6 | 10.6 | 10.2 | 7.6 | 7.7 | 5.0 |
| Precipitation (mm) | 73 | 64 | 115 | 73 | 49 | 44 | 81 | 149 | 61 | 113 | 18 | 82 |
| Sunny days | 14 | 16 | 14 | 18 | 19 | 22 | 11 | 12 | 16 | 17 | 23 | 15 |
| Rainy days | 11 | 10 | 16 | 12 | 12 | 8 | 20 | 19 | 14 | 14 | 7 | 16 |
| Snow days | 6 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Decatur during the most sunny months:
The largest precipitation sum in Decatur is at