Average annual temperature is 20.8 °C
Absolute maximum temperature: 41.7 °C
Absolute minimum temperature: -1.2 °C
Number of sunny days: 187 days
Number of rainy days: 178 days
Look at detailed online map of Summerville
* Weather data for Summerville 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) | 24.8 | 27.7 | 28.1 | 29.6 | 32.9 | 38.0 | 39.5 | 41.7 | 37.9 | 33.3 | 29.0 | 24.9 |
| Average daytime temperature (°C) | 17.8 | 19.6 | 22.7 | 24.1 | 29.7 | 34.1 | 35.9 | 38.4 | 33.3 | 27.6 | 20.0 | 17.5 |
| Average temperature (°C) | 12.7 | 13.9 | 16.7 | 18.3 | 23.6 | 27.5 | 29.7 | 32.0 | 27.1 | 21.2 | 14.4 | 11.6 |
| Average night temperature (°C) | 9.0 | 9.5 | 12.3 | 13.9 | 18.5 | 22.4 | 24.7 | 26.3 | 21.9 | 16.0 | 10.3 | 6.9 |
| Absolute minimum temperature (°C) | -0.4 | -0.2 | -1.2 | 8.5 | 11.8 | 19.3 | 21.3 | 21.5 | 18.5 | 6.7 | 1.8 | -0.6 |
| 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) | 10.3 | 11.1 | 12.0 | 13.0 | 13.8 | 14.2 | 14.0 | 13.3 | 12.4 | 11.4 | 10.6 | 10.1 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.7 | 7.2 | 8.3 | 8.2 | 10.6 | 11.6 | 11.3 | 11.8 | 10.8 | 8.9 | 6.6 | 7.7 |
| Precipitation (mm) | 191 | 101 | 78 | 199 | 77 | 156 | 54 | 24 | 47 | 29 | 88 | 112 |
| Sunny days | 10 | 10 | 10 | 9 | 16 | 6 | 17 | 25 | 19 | 25 | 18 | 22 |
| Rainy days | 21 | 18 | 21 | 21 | 15 | 24 | 14 | 6 | 11 | 6 | 12 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Summerville during the most sunny months:
The largest precipitation sum in Summerville is at