Annual Weather Averages Near Rapid City
Averages are for Ellsworth Air Force Base, which is 7 miles from Rapid City.
Based on weather reports collected during 1985–2015.
All Year Climate & Weather Averages in Rapid City
High Temp: 87 °F
Low Temp: 15 °F
Mean Temp: 48 °F
Precipitation: 0.62"
Humidity: 61%
Dew Point: 33 °F
Wind: 10 mph
Pressure: 30.00 "Hg
Visibility: 16 mi
January Climate & Weather Averages in Rapid City
High Temp: 38 °F
Low Temp: 15 °F
Mean Temp: 26 °F
Precipitation: 0.10"
Humidity: 66%
Dew Point: 16 °F
Wind: 10 mph
Pressure: 30.08 "Hg
Visibility: 14 mi
February Climate & Weather Averages in Rapid City
High Temp: 39 °F
Low Temp: 17 °F
Mean Temp: 28 °F
Precipitation: 0.15"
Humidity: 68%
Dew Point: 17 °F
Wind: 11 mph
Pressure: 30.08 "Hg
Visibility: 14 mi
March Climate & Weather Averages in Rapid City
High Temp: 49 °F
Low Temp: 25 °F
Mean Temp: 37 °F
Precipitation: 0.34"
Humidity: 65%
Dew Point: 24 °F
Wind: 11 mph
Pressure: 30.02 "Hg
Visibility: 15 mi
April Climate & Weather Averages in Rapid City
High Temp: 58 °F
Low Temp: 33 °F
Mean Temp: 46 °F
Precipitation: 1.01"
Humidity: 60%
Dew Point: 30 °F
Wind: 12 mph
Pressure: 29.95 "Hg
Visibility: 16 mi
May Climate & Weather Averages in Rapid City
High Temp: 67 °F
Low Temp: 44 °F
Mean Temp: 55 °F
Precipitation: 1.62"
Humidity: 63%
Dew Point: 42 °F
Wind: 11 mph
Pressure: 29.92 "Hg
Visibility: 18 mi
June Climate & Weather Averages in Rapid City
High Temp: 78 °F
Low Temp: 53 °F
Mean Temp: 66 °F
Precipitation: 1.52"
Humidity: 62%
Dew Point: 51 °F
Wind: 10 mph
Pressure: 29.90 "Hg
Visibility: 19 mi
July Climate & Weather Averages in Rapid City
High Temp: 87 °F
Low Temp: 60 °F
Mean Temp: 74 °F
Precipitation: 0.81"
Humidity: 55%
Dew Point: 54 °F
Wind: 9 mph
Pressure: 29.93 "Hg
Visibility: 19 mi
August Climate & Weather Averages in Rapid City
High Temp: 87 °F
Low Temp: 58 °F
Mean Temp: 72 °F
Precipitation: 0.54"
Humidity: 53%
Dew Point: 52 °F
Wind: 9 mph
Pressure: 29.95 "Hg
Visibility: 18 mi
September Climate & Weather Averages in Rapid City
High Temp: 77 °F
Low Temp: 48 °F
Mean Temp: 62 °F
Precipitation: 0.53"
Humidity: 52%
Dew Point: 42 °F
Wind: 9 mph
Pressure: 29.98 "Hg
Visibility: 17 mi
October Climate & Weather Averages in Rapid City
High Temp: 61 °F
Low Temp: 36 °F
Mean Temp: 49 °F
Precipitation: 0.48"
Humidity: 58%
Dew Point: 32 °F
Wind: 10 mph
Pressure: 30.02 "Hg
Visibility: 16 mi
November Climate & Weather Averages in Rapid City
High Temp: 48 °F
Low Temp: 25 °F
Mean Temp: 36 °F
Precipitation: 0.20"
Humidity: 63%
Dew Point: 23 °F
Wind: 10 mph
Pressure: 30.05 "Hg
Visibility: 15 mi
December Climate & Weather Averages in Rapid City
High Temp: 38 °F
Low Temp: 16 °F
Mean Temp: 27 °F
Precipitation: 0.11"
Humidity: 67%
Dew Point: 16 °F
Wind: 10 mph
Pressure: 30.08 "Hg
Visibility: 14 mi