Rapid City Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Rapid City, South Dakota during each month of the year.
The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 70, 80 or 90 °F each month in Rapid City, scroll down farther. There are also monthly and yearly counts of days with cold weather.
All the numbers are long-term historical averages based on climate data gathered from 1981 to 2010.
|High °F||Low °F||High °C||Low °C|
Days of Hot Weather in Rapid City
Most summer days stay quite comfortable at Rapid City with highs in the 70s or 80s Fahrenheit. Normally 18 days a year reach 90 degrees and one day spikes to 100 or more.
How Often Rapid City Has Cold Temperatures
Rapid City typically has 141 frosty nights a year that show up from October to May. A dozen of the coldest winter nights drop down to 0 °F (-18 °C) or lower.
For an average of 42 days annually the thermometer never rises above freezing. Days that chilly can occur from October to April.
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.