Average annual temperature is 10.8 °C
Absolute maximum temperature: 38.7 °C
Absolute minimum temperature: -21.9 °C
Number of sunny days: 218 days
Number of rainy days: 121 days
Number of snow days: 26 days
Look at detailed online map of Sumter
* Weather data for Sumter 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) | 6.0 | 13.3 | 18.9 | 28.7 | 29.4 | 33.7 | 36.5 | 38.7 | 35.9 | 30.3 | 18.9 | 14.0 |
| Average daytime temperature (°C) | -1.7 | 3.8 | 8.2 | 17.7 | 24.5 | 28.8 | 29.5 | 30.9 | 27.2 | 17.2 | 11.3 | 5.5 |
| Average temperature (°C) | -5.3 | -2.9 | 0.7 | 10.1 | 18.0 | 22.5 | 23.4 | 24.4 | 20.8 | 11.4 | 5.1 | 0.5 |
| Average night temperature (°C) | -8.8 | -7.6 | -4.3 | 3.9 | 12.1 | 16.8 | 18.1 | 19.0 | 15.1 | 6.6 | 0.4 | -3.1 |
| Absolute minimum temperature (°C) | -21.9 | -20.2 | -10.8 | -6.0 | 1.6 | 9.9 | 12.1 | 12.6 | 8.8 | -8.0 | -6.8 | -7.4 |
| 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 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.1 | 8.0 | 9.0 | 10.8 | 11.1 | 12.4 | 12.1 | 11.8 | 10.5 | 7.7 | 7.2 | 4.9 |
| Precipitation (mm) | 67 | 22 | 23 | 10 | 66 | 128 | 81 | 47 | 36 | 69 | 22 | 43 |
| Sunny days | 17 | 18 | 21 | 24 | 8 | 12 | 15 | 18 | 22 | 17 | 24 | 22 |
| Rainy days | 5 | 4 | 6 | 5 | 23 | 18 | 16 | 13 | 8 | 12 | 4 | 7 |
| Snow days | 9 | 6 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 |
The best time to visit Sumter during the most sunny months:
The largest precipitation sum in Sumter is at