WeatherWX.com
Charleston Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 33°F Lo 14°F | Hi 35°F Lo 17°F | Hi 43°F Lo 24°F | Hi 51°F Lo 29°F | Hi 63°F Lo 37°F | Hi 78°F Lo 47°F | Hi 87°F Lo 56°F | Hi 85°F Lo 54°F | Hi 77°F Lo 48°F | Hi 59°F Lo 35°F | Hi 45°F Lo 23°F | Hi 33°F Lo 14°F |
| 4 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph | 5 mph | 4 mph |
| 2.2 in | 1.8 in | 2.5 in | 2.4 in | 1.8 in | 0.7 in | 0.4 in | 0.8 in | 1.1 in | 1.5 in | 1.6 in | 3 in |
| 87% | 86% | 80% | 68% | 59% | 46% | 42% | 44% | 45% | 56% | 68% | 83% |
| 47% | 50% | 44% | 36% | 28% | 16% | 16% | 14% | 14% | 22% | 31% | 47% |
| 30.3 in | 30.1 in | 30.0 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 30.0 in | 30.0 in | 30.1 in | 30.2 in |
| 15 | 15 | 17 | 17 | 24 | 27 | 28 | 28 | 27 | 25 | 20 | 14 |
| 10 | 9 | 7 | 8 | 7 | 3 | 3 | 3 | 3 | 5 | 6 | 10 |
| 6 | 5 | 7 | 5 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 7 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 1 | 2 | 2 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 154 | 127 | 165 | 196 | 252 | 304 | 321 | 326 | 308 | 282 | 222 | 167 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 1°C Lo -10°C | Hi 2°C Lo -8°C | Hi 6°C Lo -5°C | Hi 10°C Lo -2°C | Hi 17°C Lo 3°C | Hi 25°C Lo 9°C | Hi 31°C Lo 14°C | Hi 29°C Lo 12°C | Hi 25°C Lo 9°C | Hi 15°C Lo 2°C | Hi 7°C Lo -5°C | Hi 1°C Lo -10°C |
| 6 km/h | 7 km/h | 8 km/h | 8 km/h | 8 km/h | 9 km/h | 8 km/h | 8 km/h | 8 km/h | 8 km/h | 7 km/h | 7 km/h |
| 57 mm | 46 mm | 63 mm | 61 mm | 46 mm | 18 mm | 11 mm | 20 mm | 29 mm | 39 mm | 40 mm | 77 mm |
| 87% | 86% | 80% | 68% | 59% | 46% | 42% | 44% | 45% | 56% | 68% | 83% |
| 47% | 50% | 44% | 36% | 28% | 16% | 16% | 14% | 14% | 22% | 31% | 47% |
| 1025 mb | 1021 mb | 1017 mb | 1014 mb | 1012 mb | 1012 mb | 1013 mb | 1014 mb | 1015 mb | 1017 mb | 1021 mb | 1023 mb |
| 15 | 15 | 17 | 17 | 24 | 27 | 28 | 28 | 27 | 25 | 20 | 14 |
| 10 | 9 | 7 | 8 | 7 | 3 | 3 | 3 | 3 | 5 | 6 | 10 |
| 6 | 5 | 7 | 5 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 7 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 1 | 2 | 2 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 154 | 127 | 165 | 196 | 252 | 304 | 321 | 326 | 308 | 282 | 222 | 167 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.