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 1992–2021.
All Year Climate & Weather Averages in Rapid City
High Temp: 87 °F
Low Temp: 15 °F
Mean Temp: 48 °F
Precipitation: 1.37"
Humidity: 62%
Dew Point: 34 °F
Wind: 19 mph
Pressure: 30.00 "Hg
Visibility: 13 mi
January Climate & Weather Averages in Rapid City
High Temp: 38 °F
Low Temp: 15 °F
Mean Temp: 26 °F
Precipitation: 0.28"
Humidity: 69%
Dew Point: 16 °F
Wind: 20 mph
Pressure: 30.09 "Hg
Visibility: 12 mi
February Climate & Weather Averages in Rapid City
High Temp: 39 °F
Low Temp: 16 °F
Mean Temp: 27 °F
Precipitation: 0.50"
Humidity: 69%
Dew Point: 17 °F
Wind: 20 mph
Pressure: 30.08 "Hg
Visibility: 12 mi
March Climate & Weather Averages in Rapid City
High Temp: 49 °F
Low Temp: 25 °F
Mean Temp: 37 °F
Precipitation: 1.00"
Humidity: 65%
Dew Point: 24 °F
Wind: 21 mph
Pressure: 30.03 "Hg
Visibility: 12 mi
April Climate & Weather Averages in Rapid City
High Temp: 57 °F
Low Temp: 33 °F
Mean Temp: 45 °F
Precipitation: 1.82"
Humidity: 62%
Dew Point: 31 °F
Wind: 22 mph
Pressure: 29.96 "Hg
Visibility: 13 mi
May Climate & Weather Averages in Rapid City
High Temp: 67 °F
Low Temp: 43 °F
Mean Temp: 55 °F
Precipitation: 3.16"
Humidity: 64%
Dew Point: 42 °F
Wind: 21 mph
Pressure: 29.94 "Hg
Visibility: 14 mi
June Climate & Weather Averages in Rapid City
High Temp: 78 °F
Low Temp: 54 °F
Mean Temp: 66 °F
Precipitation: 2.54"
Humidity: 62%
Dew Point: 51 °F
Wind: 19 mph
Pressure: 29.89 "Hg
Visibility: 15 mi
July Climate & Weather Averages in Rapid City
High Temp: 87 °F
Low Temp: 61 °F
Mean Temp: 74 °F
Precipitation: 2.12"
Humidity: 57%
Dew Point: 55 °F
Wind: 17 mph
Pressure: 29.94 "Hg
Visibility: 15 mi
August Climate & Weather Averages in Rapid City
High Temp: 86 °F
Low Temp: 59 °F
Mean Temp: 72 °F
Precipitation: 1.54"
Humidity: 55%
Dew Point: 52 °F
Wind: 17 mph
Pressure: 29.95 "Hg
Visibility: 14 mi
September Climate & Weather Averages in Rapid City
High Temp: 77 °F
Low Temp: 49 °F
Mean Temp: 63 °F
Precipitation: 1.14"
Humidity: 54%
Dew Point: 43 °F
Wind: 18 mph
Pressure: 29.97 "Hg
Visibility: 14 mi
October Climate & Weather Averages in Rapid City
High Temp: 61 °F
Low Temp: 36 °F
Mean Temp: 49 °F
Precipitation: 1.32"
Humidity: 60%
Dew Point: 32 °F
Wind: 20 mph
Pressure: 30.01 "Hg
Visibility: 13 mi
November Climate & Weather Averages in Rapid City
High Temp: 49 °F
Low Temp: 25 °F
Mean Temp: 37 °F
Precipitation: 0.60"
Humidity: 63%
Dew Point: 23 °F
Wind: 19 mph
Pressure: 30.06 "Hg
Visibility: 13 mi
December Climate & Weather Averages in Rapid City
High Temp: 38 °F
Low Temp: 16 °F
Mean Temp: 27 °F
Precipitation: 0.39"
Humidity: 68%
Dew Point: 17 °F
Wind: 19 mph
Pressure: 30.07 "Hg
Visibility: 12 mi