Average annual temperature is 12.0 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -12.2 °C
Number of sunny days: 164 days
Number of rainy days: 194 days
Number of snow days: 7 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) | 14.5 | 19.8 | 19.3 | 29.5 | 31.2 | 33.8 | 34.5 | 32.4 | 32.8 | 27.9 | 19.9 | 14.8 |
| Average daytime temperature (°C) | 6.7 | 9.3 | 9.8 | 18.9 | 22.2 | 26.0 | 29.8 | 28.1 | 23.9 | 18.4 | 10.6 | 7.5 |
| Average temperature (°C) | 3.0 | 2.9 | 4.0 | 11.9 | 15.2 | 19.6 | 23.7 | 22.0 | 18.4 | 13.2 | 5.3 | 3.6 |
| Average night temperature (°C) | 0.2 | -1.7 | -0.4 | 5.9 | 8.2 | 13.9 | 18.1 | 16.9 | 13.8 | 9.0 | 1.1 | 0.7 |
| Absolute minimum temperature (°C) | -3.9 | -12.2 | -6.8 | -1.6 | 2.6 | 8.0 | 14.6 | 13.6 | 8.2 | 0.3 | -6.2 | -4.4 |
| 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 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 4.4 | 6.9 | 7.1 | 9.0 | 11.0 | 10.6 | 12.0 | 10.7 | 8.8 | 7.2 | 7.3 | 3.9 |
| Precipitation (mm) | 90 | 44 | 85 | 86 | 24 | 122 | 99 | 105 | 75 | 65 | 58 | 104 |
| Sunny days | 11 | 13 | 12 | 15 | 18 | 12 | 8 | 10 | 16 | 17 | 18 | 14 |
| Rainy days | 18 | 13 | 18 | 15 | 13 | 18 | 23 | 21 | 14 | 14 | 12 | 15 |
| Snow days | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Decatur during the most sunny months:
The largest precipitation sum in Decatur is at