Annual Weather Averages Near Summerville
Averages are for Charleston Air Force Base Reporting Station, which is 11 miles from Summerville.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Summerville
High Temp: 91 °F
Low Temp: 39 °F
Mean Temp: 67 °F
Precipitation: 4.38"
Humidity: 71%
Dew Point: 56 °F
Wind: 12 mph
Pressure: 30.06 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Summerville
High Temp: 61 °F
Low Temp: 39 °F
Mean Temp: 50 °F
Precipitation: 3.28"
Humidity: 68%
Dew Point: 39 °F
Wind: 13 mph
Pressure: 30.14 "Hg
Visibility: 9 mi
February Climate & Weather Averages in Summerville
High Temp: 64 °F
Low Temp: 42 °F
Mean Temp: 53 °F
Precipitation: 3.26"
Humidity: 68%
Dew Point: 42 °F
Wind: 14 mph
Pressure: 30.11 "Hg
Visibility: 9 mi
March Climate & Weather Averages in Summerville
High Temp: 71 °F
Low Temp: 48 °F
Mean Temp: 59 °F
Precipitation: 3.30"
Humidity: 65%
Dew Point: 46 °F
Wind: 14 mph
Pressure: 30.08 "Hg
Visibility: 9 mi
April Climate & Weather Averages in Summerville
High Temp: 77 °F
Low Temp: 55 °F
Mean Temp: 66 °F
Precipitation: 3.19"
Humidity: 65%
Dew Point: 53 °F
Wind: 15 mph
Pressure: 30.03 "Hg
Visibility: 9 mi
May Climate & Weather Averages in Summerville
High Temp: 84 °F
Low Temp: 63 °F
Mean Temp: 73 °F
Precipitation: 3.28"
Humidity: 69%
Dew Point: 62 °F
Wind: 14 mph
Pressure: 30.02 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Summerville
High Temp: 89 °F
Low Temp: 71 °F
Mean Temp: 80 °F
Precipitation: 6.29"
Humidity: 74%
Dew Point: 70 °F
Wind: 12 mph
Pressure: 30.00 "Hg
Visibility: 9 mi
July Climate & Weather Averages in Summerville
High Temp: 91 °F
Low Temp: 74 °F
Mean Temp: 83 °F
Precipitation: 6.63"
Humidity: 75%
Dew Point: 73 °F
Wind: 11 mph
Pressure: 30.02 "Hg
Visibility: 9 mi
August Climate & Weather Averages in Summerville
High Temp: 90 °F
Low Temp: 73 °F
Mean Temp: 82 °F
Precipitation: 6.97"
Humidity: 76%
Dew Point: 73 °F
Wind: 10 mph
Pressure: 30.01 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Summerville
High Temp: 86 °F
Low Temp: 69 °F
Mean Temp: 77 °F
Precipitation: 5.78"
Humidity: 76%
Dew Point: 68 °F
Wind: 11 mph
Pressure: 30.02 "Hg
Visibility: 9 mi
October Climate & Weather Averages in Summerville
High Temp: 78 °F
Low Temp: 58 °F
Mean Temp: 68 °F
Precipitation: 4.48"
Humidity: 74%
Dew Point: 59 °F
Wind: 11 mph
Pressure: 30.06 "Hg
Visibility: 9 mi
November Climate & Weather Averages in Summerville
High Temp: 70 °F
Low Temp: 47 °F
Mean Temp: 58 °F
Precipitation: 2.67"
Humidity: 72%
Dew Point: 48 °F
Wind: 12 mph
Pressure: 30.13 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Summerville
High Temp: 63 °F
Low Temp: 42 °F
Mean Temp: 52 °F
Precipitation: 3.42"
Humidity: 72%
Dew Point: 43 °F
Wind: 12 mph
Pressure: 30.14 "Hg
Visibility: 9 mi