Annual Weather Averages in Charleston
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Charleston
High Temp: 30 °C
Low Temp: -3 °C
Mean Temp: 13 °C
Precipitation: 98.7 mm
Humidity: 69%
Dew Point: 7 °C
Wind: 9 km/h
Pressure: 101.80 kPa
Visibility: 13 km
January Climate & Weather Averages in Charleston
High Temp: 6 °C
Low Temp: -3 °C
Mean Temp: 2 °C
Precipitation: 84.2 mm
Humidity: 70%
Dew Point: -3 °C
Wind: 13 km/h
Pressure: 102.02 kPa
Visibility: 13 km
February Climate & Weather Averages in Charleston
High Temp: 9 °C
Low Temp: -2 °C
Mean Temp: 3 °C
Precipitation: 92.5 mm
Humidity: 67%
Dew Point: -3 °C
Wind: 13 km/h
Pressure: 101.94 kPa
Visibility: 14 km
March Climate & Weather Averages in Charleston
High Temp: 14 °C
Low Temp: 2 °C
Mean Temp: 8 °C
Precipitation: 103.8 mm
Humidity: 62%
Dew Point: 0 °C
Wind: 13 km/h
Pressure: 101.85 kPa
Visibility: 14 km
April Climate & Weather Averages in Charleston
High Temp: 21 °C
Low Temp: 7 °C
Mean Temp: 14 °C
Precipitation: 89.8 mm
Humidity: 58%
Dew Point: 5 °C
Wind: 12 km/h
Pressure: 101.56 kPa
Visibility: 15 km
May Climate & Weather Averages in Charleston
High Temp: 24 °C
Low Temp: 12 °C
Mean Temp: 18 °C
Precipitation: 127.1 mm
Humidity: 69%
Dew Point: 12 °C
Wind: 9 km/h
Pressure: 101.60 kPa
Visibility: 14 km
June Climate & Weather Averages in Charleston
High Temp: 28 °C
Low Temp: 16 °C
Mean Temp: 22 °C
Precipitation: 121.2 mm
Humidity: 72%
Dew Point: 17 °C
Wind: 8 km/h
Pressure: 101.53 kPa
Visibility: 13 km
July Climate & Weather Averages in Charleston
High Temp: 30 °C
Low Temp: 19 °C
Mean Temp: 24 °C
Precipitation: 137.0 mm
Humidity: 74%
Dew Point: 19 °C
Wind: 6 km/h
Pressure: 101.60 kPa
Visibility: 12 km
August Climate & Weather Averages in Charleston
High Temp: 29 °C
Low Temp: 18 °C
Mean Temp: 24 °C
Precipitation: 98.3 mm
Humidity: 75%
Dew Point: 19 °C
Wind: 5 km/h
Pressure: 101.68 kPa
Visibility: 11 km
September Climate & Weather Averages in Charleston
High Temp: 26 °C
Low Temp: 14 °C
Mean Temp: 20 °C
Precipitation: 85.3 mm
Humidity: 73%
Dew Point: 15 °C
Wind: 6 km/h
Pressure: 101.78 kPa
Visibility: 12 km
October Climate & Weather Averages in Charleston
High Temp: 20 °C
Low Temp: 7 °C
Mean Temp: 14 °C
Precipitation: 76.7 mm
Humidity: 72%
Dew Point: 8 °C
Wind: 7 km/h
Pressure: 101.87 kPa
Visibility: 13 km
November Climate & Weather Averages in Charleston
High Temp: 14 °C
Low Temp: 2 °C
Mean Temp: 8 °C
Precipitation: 79.0 mm
Humidity: 67%
Dew Point: 2 °C
Wind: 9 km/h
Pressure: 102.08 kPa
Visibility: 14 km
December Climate & Weather Averages in Charleston
High Temp: 9 °C
Low Temp: -1 °C
Mean Temp: 4 °C
Precipitation: 89.1 mm
Humidity: 72%
Dew Point: -1 °C
Wind: 11 km/h
Pressure: 102.06 kPa
Visibility: 14 km