Average annual temperature is 18.3 °C
Absolute maximum temperature: 37.8 °C
Absolute minimum temperature: -3.8 °C
Number of sunny days: 189 days
Number of rainy days: 176 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) | 22.6 | 26.1 | 26.6 | 29.5 | 32.2 | 36.0 | 36.8 | 37.8 | 33.3 | 30.0 | 26.1 | 22.5 |
| Average daytime temperature (°C) | 15.7 | 18.8 | 20.3 | 22.9 | 27.1 | 31.4 | 33.3 | 33.6 | 30.5 | 24.5 | 18.4 | 15.1 |
| Average temperature (°C) | 10.7 | 12.9 | 14.2 | 16.9 | 20.8 | 24.9 | 26.8 | 27.3 | 24.1 | 18.8 | 12.7 | 9.5 |
| Average night temperature (°C) | 7.0 | 8.8 | 9.1 | 11.9 | 15.8 | 19.5 | 22.2 | 22.5 | 19.1 | 14.0 | 8.4 | 5.3 |
| Absolute minimum temperature (°C) | -2.4 | -2.5 | -3.8 | 6.6 | 8.5 | 17.6 | 19.7 | 18.1 | 15.3 | 6.9 | -2.0 | -1.2 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.4 | 10.5 | 10.0 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 5.8 | 7.1 | 9.0 | 9.6 | 10.7 | 11.8 | 11.0 | 10.7 | 10.8 | 8.7 | 6.8 | 7.2 |
| Precipitation (mm) | 147 | 156 | 94 | 127 | 103 | 106 | 122 | 125 | 23 | 20 | 105 | 79 |
| Sunny days | 13 | 11 | 19 | 15 | 11 | 10 | 9 | 14 | 19 | 25 | 22 | 21 |
| Rainy days | 18 | 17 | 12 | 15 | 20 | 20 | 22 | 17 | 11 | 6 | 8 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sumter during the most sunny months:
The largest precipitation sum in Sumter is at