Average annual temperature is 13.3 °C
Absolute maximum temperature: 34.4 °C
Absolute minimum temperature: -8.9 °C
Number of sunny days: 165 days
Number of rainy days: 194 days
Number of snow days: 6 days
Look at detailed online map of Charleston (historical)
* Weather data for Charleston (historical) 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) | 16.7 | 23.2 | 24.6 | 28.1 | 30.5 | 33.3 | 34.4 | 33.6 | 34.1 | 29.0 | 22.9 | 17.2 |
| Average daytime temperature (°C) | 8.3 | 12.8 | 12.6 | 19.1 | 23.0 | 26.7 | 30.2 | 28.9 | 26.3 | 19.7 | 13.0 | 9.7 |
| Average temperature (°C) | 3.9 | 5.7 | 6.1 | 12.5 | 16.7 | 20.7 | 24.1 | 22.9 | 20.3 | 14.3 | 7.1 | 5.1 |
| Average night temperature (°C) | 0.4 | 0.8 | 1.3 | 6.8 | 11.1 | 15.4 | 19.2 | 18.0 | 15.1 | 10.1 | 2.8 | 1.8 |
| Absolute minimum temperature (°C) | -6.5 | -8.9 | -7.4 | -0.2 | 4.0 | 10.5 | 15.2 | 12.8 | 10.6 | 2.0 | -6.9 | -4.9 |
| 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 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.5 | 11.2 | 10.0 | 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) | 4.0 | 7.3 | 7.7 | 9.3 | 10.1 | 11.1 | 11.8 | 10.7 | 9.6 | 7.3 | 7.2 | 5.1 |
| Precipitation (mm) | 147 | 51 | 106 | 67 | 71 | 83 | 86 | 86 | 42 | 76 | 45 | 63 |
| Sunny days | 7 | 14 | 15 | 14 | 18 | 12 | 6 | 14 | 18 | 14 | 21 | 12 |
| Rainy days | 23 | 14 | 13 | 16 | 13 | 18 | 25 | 17 | 12 | 17 | 8 | 18 |
| Snow days | 1 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Charleston (historical) during the most sunny months:
The largest precipitation sum in Charleston (historical) is at