TODAY AUG20
TEMPERATURE63
HUMIDITY65
PRESSURE30.16
WIND COND.350 25.3
  • 7051Mon
  • 6852Tue20%
  • 7960Wed
  • 8559Thu
  • 8558Fri
daynightWeather update from Rapid City, Rapid City Regional Airport at

Rapid City Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January18°F40°F27°F1.2"
February18°F40°F27°F1.3"
March31°F56°F41°F1.7"
April35°F58°F45°F11.2"
May46°F69°F56°F12.4"
June57°F81°F68°F3.1"
July65°F93°F78°F3.2"
August61°F87°F73°F5.4"
September51°F81°F64°F1.4"
October40°F64°F50°F36.4"
November29°F51°F39°F3.7"
December17°F35°F24°F1.5"

Did you know?

  • The highest monthly average temperature in Rapid City for July is 78 degrees.
  • The lowest monthly average temperature in Rapid City for December is 24 degrees.
  • The most monthly precipitation in Rapid City occurs in October with 36.4 inches.
  • The air quality index in Rapid City is 13% better than the national average.
  • The pollution index in Rapid City is 61% better than the national average.

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Compare Rapid City, SD Weather To Other Cities

Rapid City air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexRapid CitySouth DakotaNational
Air quality index433650
Pollution index1,968,790463,9835,066,862

Rapid City air quality information

MeasurementTotal
Days measured365
Days with good air quality264
Days with moderate air quality101
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Rapid City air quality information

PollutantTotal
Arsenic0.003%
Benzene0.030%
Carbon Tetrachloride0.004%
Lead0.020%
Mercury0.010%

Average monthly Rapid City temperature with heat index

Rapid City monthly precipitation with daily maximum

Rapid City monthly snow depth with daily maximum

Rapid City monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Blackhawk, SD2,9814314%
Green Valley, SD7694314%
Rapid Valley, SD8,6294314%
Box Elder, SD9,1264314%
Johnson Siding, SD6744314%
Rapid City, SD72,4414314%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Waldorf, MD72,413492%
Layton, UT72,413492%
Iowa City, IA72,3854216%
Goodyear, AZ72,6297448%
Jonesboro, AR72,6384412%
Rapid City, SD72,4414314%
Source: The Rapid City, SD weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.