Average annual temperature is 6.9 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -19.7 °C
Number of sunny days: 183 days
Number of rainy days: 120 days
Number of snow days: 62 days
Look at detailed online map of Charleston
* Weather data for Charleston 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) | 5.4 | 5.9 | 8.3 | 19.1 | 22.6 | 25.0 | 34.3 | 30.3 | 27.3 | 22.2 | 17.2 | 10.4 |
| Average daytime temperature (°C) | -0.6 | 0.8 | 1.9 | 8.7 | 17.0 | 21.0 | 30.0 | 27.0 | 22.5 | 16.1 | 9.2 | 4.5 |
| Average temperature (°C) | -4.2 | -5.0 | -2.7 | 3.0 | 10.6 | 14.8 | 22.0 | 19.8 | 14.8 | 8.8 | 2.4 | -2.3 |
| Average night temperature (°C) | -7.1 | -9.2 | -6.6 | -1.4 | 4.9 | 8.9 | 14.6 | 13.6 | 8.5 | 3.7 | -2.1 | -6.9 |
| Absolute minimum temperature (°C) | -19.7 | -15.5 | -11.6 | -10.8 | -1.5 | 3.6 | 11.2 | 10.7 | 0.2 | -5.5 | -12.9 | -19.7 |
| 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) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 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) | 4.9 | 7.4 | 7.0 | 10.1 | 12.5 | 12.7 | 13.3 | 12.0 | 10.9 | 9.2 | 7.2 | 7.1 |
| Precipitation (mm) | 159 | 79 | 177 | 60 | 13 | 57 | 4 | 39 | 24 | 73 | 48 | 63 |
| Sunny days | 5 | 14 | 8 | 15 | 18 | 8 | 25 | 12 | 17 | 21 | 21 | 19 |
| Rainy days | 6 | 3 | 7 | 9 | 13 | 22 | 6 | 19 | 13 | 9 | 7 | 6 |
| Snow days | 20 | 11 | 16 | 6 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 6 |
The best time to visit Charleston during the most sunny months:
The largest precipitation sum in Charleston is at