Average annual temperature is 11.9 °C
Absolute maximum temperature: 40.1 °C
Absolute minimum temperature: -7.7 °C
Number of sunny days: 207 days
Number of rainy days: 129 days
Number of snow days: 29 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) | 16.5 | 16.7 | 12.5 | 29.5 | 30.2 | 35.4 | 38.6 | 40.1 | 34.0 | 30.1 | 21.9 | 18.6 |
| Average daytime temperature (°C) | 8.5 | 10.0 | 6.2 | 14.8 | 21.9 | 25.9 | 33.9 | 32.4 | 25.4 | 22.3 | 15.2 | 12.1 |
| Average temperature (°C) | 3.7 | 3.3 | 1.9 | 7.8 | 14.1 | 17.6 | 24.5 | 23.2 | 17.4 | 13.6 | 8.4 | 6.7 |
| Average night temperature (°C) | 0.5 | -0.9 | -1.6 | 2.5 | 7.0 | 10.0 | 15.6 | 15.2 | 10.9 | 7.8 | 4.2 | 3.4 |
| Absolute minimum temperature (°C) | -5.9 | -7.7 | -7.0 | -4.7 | 1.2 | 3.8 | 11.9 | 10.1 | 5.0 | -0.9 | -2.2 | -3.0 |
| 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 | 9.3 |
| 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) | 5.0 | 6.8 | 6.2 | 9.2 | 11.5 | 13.2 | 13.7 | 12.1 | 10.1 | 8.5 | 6.9 | 4.2 |
| Precipitation (mm) | 284 | 145 | 280 | 77 | 59 | 37 | 0 | 14 | 46 | 34 | 83 | 178 |
| Sunny days | 13 | 14 | 5 | 17 | 19 | 16 | 30 | 22 | 20 | 21 | 18 | 12 |
| Rainy days | 14 | 6 | 14 | 8 | 12 | 14 | 1 | 9 | 10 | 10 | 12 | 19 |
| Snow days | 4 | 8 | 12 | 5 | 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