Charleston Climate: Weather by Month and Best Time to Visit
Best months for Charleston: September, August, October.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 7°C | -2°C | 102 mm | 12 | – | – | 4.6 |
| February | 9°C | -1°C | 97 mm | 12 | – | – | 5.1 |
| March | 14°C | 3°C | 119 mm | 14 | – | – | 5.7 |
| April | 20°C | 9°C | 110 mm | 13 | – | – | 6.9 |
| May | 24°C | 13°C | 128 mm | 15 | – | – | 6.9 |
| June | 27°C | 18°C | 124 mm | 14 | – | – | 7.0 |
| July | 29°C | 20°C | 128 mm | 14 | – | – | 6.9 |
| August | 28°C | 19°C | 99 mm | 12 | – | – | 7.5 |
| September | 26°C | 15°C | 97 mm | 10 | – | – | 7.7 |
| October | 20°C | 9°C | 86 mm | 9 | – | – | 7.5 |
| November | 14°C | 4°C | 86 mm | 10 | – | – | 6.4 |
| December | 8°C | 0°C | 105 mm | 12 | – | – | 5.1 |