Average annual temperature is 13.9 °C
Absolute maximum temperature: 36.8 °C
Absolute minimum temperature: -12.0 °C
Number of sunny days: 196 days
Number of rainy days: 161 days
Number of snow days: 8 days
Look at detailed online map of Effingham
* Weather data for Effingham 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) | 19.3 | 21.1 | 22.4 | 28.0 | 31.3 | 34.6 | 35.9 | 36.8 | 32.0 | 29.7 | 25.1 | 16.6 |
| Average daytime temperature (°C) | 7.5 | 10.6 | 12.2 | 19.9 | 25.2 | 29.4 | 30.6 | 29.2 | 26.6 | 19.9 | 13.5 | 9.6 |
| Average temperature (°C) | 3.0 | 4.6 | 6.2 | 12.9 | 18.9 | 23.1 | 25.1 | 23.9 | 21.0 | 14.8 | 7.9 | 5.1 |
| Average night temperature (°C) | -0.2 | 0.3 | 1.6 | 7.3 | 13.1 | 17.5 | 20.3 | 19.4 | 16.1 | 10.7 | 3.5 | 2.1 |
| Absolute minimum temperature (°C) | -12.0 | -11.6 | -7.2 | -0.2 | 5.0 | 11.9 | 16.9 | 13.4 | 11.8 | -2.4 | -7.4 | -6.5 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.5 | 7.6 | 7.0 | 9.9 | 11.3 | 12.0 | 12.4 | 10.1 | 10.4 | 7.5 | 7.9 | 5.4 |
| Precipitation (mm) | 91 | 64 | 171 | 92 | 60 | 64 | 91 | 187 | 57 | 58 | 19 | 66 |
| Sunny days | 13 | 17 | 13 | 15 | 21 | 19 | 8 | 14 | 17 | 21 | 23 | 15 |
| Rainy days | 11 | 11 | 17 | 15 | 10 | 11 | 23 | 17 | 13 | 10 | 7 | 16 |
| Snow days | 7 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Effingham during the most sunny months:
The largest precipitation sum in Effingham is at