Average annual temperature is 14.4 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -7.8 °C
Number of sunny days: 168 days
Number of rainy days: 193 days
Number of snow days: 4 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) | 21.5 | 24.5 | 24.8 | 30.2 | 28.1 | 31.9 | 34.4 | 33.5 | 32.4 | 28.6 | 25.6 | 19.9 |
| Average daytime temperature (°C) | 11.4 | 14.5 | 14.4 | 21.2 | 23.2 | 27.0 | 30.4 | 28.7 | 25.5 | 20.8 | 14.8 | 11.8 |
| Average temperature (°C) | 6.1 | 7.9 | 8.1 | 14.1 | 17.1 | 21.0 | 24.6 | 23.1 | 20.1 | 15.3 | 8.4 | 6.6 |
| Average night temperature (°C) | 2.6 | 3.2 | 3.1 | 8.2 | 11.7 | 15.7 | 19.7 | 18.8 | 15.6 | 10.9 | 3.7 | 3.0 |
| Absolute minimum temperature (°C) | -6.2 | -7.8 | -7.3 | 0.9 | 4.4 | 10.1 | 15.9 | 13.3 | 11.3 | 2.6 | -6.0 | -4.8 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 4.5 | 6.6 | 7.4 | 9.3 | 9.7 | 10.9 | 11.8 | 10.1 | 9.6 | 7.6 | 7.5 | 5.1 |
| Precipitation (mm) | 109 | 101 | 99 | 52 | 108 | 50 | 130 | 226 | 76 | 52 | 52 | 85 |
| Sunny days | 10 | 14 | 15 | 20 | 16 | 12 | 6 | 7 | 16 | 17 | 20 | 15 |
| Rainy days | 20 | 13 | 15 | 10 | 15 | 18 | 25 | 24 | 14 | 14 | 10 | 15 |
| Snow days | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Charleston during the most sunny months:
The largest precipitation sum in Charleston is at