Rapid City Chamber of Commerce

Climate

Spring (April - mid June)

Mostly sunny days characterize spring in Rapid City but this can also be the rainy season. Spring snow showers are a possibility through early May. This is also the traditional flood season for the area. Temperatures range from the 40s to the 80s. Early spring flowers are out in full force. Rapid City can see an average of 20 clear to partly cloudy days in June as well as 65 percent possibility of sunshine. Evening temperatures can dip into the 30s and 40s so bring a jacket for evening activities.

Summer (late June – mid September)

Warm (sometimes hot) sunny days are normal for Rapid City in the summer. These summer months are the warmest months of the year with temperatures around the 70s and 80s, but occasionally climbing into the 100s. Don't worry, the low humidity and breezy Chinook winds make the hottest days bearable. This time of year is perfect for water recreation and camping. Bring a jacket, as evenings can be cool. Please remember that the Black Hills is extremely susceptible to wildfires so when camping and playing in the hills be aware of the fire danger.

Fall (mid September – November)

Beautiful days with comfortable warm weather through September and crisp cool nights into November make fall an excellent time to explore Rapid City and the Black Hills. Temperatures start to cool around Labor Day with highs averaging in the 60s and 70s during the day and dropping into the 40s in the evenings.

Winter (December – March)

While temperatures may be wintry, dipping below zero degrees Fahrenheit at times, cold spells usually alternate with milder weather. The average daytime temperature is in the mid 30s. Being located at the foothills of the Black Hills can be a benefit. Sometimes there will be an air inversion that will trap warm air over the city providing them with unseasonable warmer temperatures. Occasionally snowfall is prevalent. The average snowfall for Rapid City is approximately 5 inches per storm. Snowfall doesn't stick around long in the city, usually melting within a few days. The Northern Black Hills usually has an abundance of snow which provides excellent conditions for winter sports.

Weather Records

Rapid City holds two weather records — fastest temperature rise of 49 °F (27 °C) in 2 minutes on January 22, 1943 and fastest temperature drop of 47 °F (26 °C) in 5 minutes on January 10, 1911.

Annual Average Temperature: 46.6º F
January: 34º F
July: 86º F
Annual Average Temperature:  
Annual Average Rainfall: 16.7 inches
Annual Average Snowfall: 39.1 inches
Prevailing Winds: Northwesterly
Average Sunny Days: 275
Average Elevation: 3162 feet

View the current National Weather Service Forecast for Rapid City, SD