Rapid City Weather Forecast

    • 58
    • 73

    Rain Showers Likely

    • 46
    • 78

    Mostly Sunny

    • 50
    • 69

    Partly Sunny

    • 50
    • 80

    Chance Rain Showers

    • 52
    • 73

    Chance Rain Showers

    • 48
    • 77

    Chance Rain Showers

Today 13 Sep Rapid City

Partly cloudy. Highs in the lower 70s. Southeast Winds 10 to 20 Mph with Gusts up to 30 Mph.

Tonight 13 Sep Rapid City

Showers and Thunderstorms likely. Lows in the upper 50s. Southeast Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rapid City Temperature Statistics

September Temperature

Ellsworth Air Force Base (8.1 miles)

  • Lowest 10 September, 2026

    51.8 °F

  • Average September

    75.4 °F

  • Highest 4 September, 2026

    96.4 °F

Climate (2021–2026)

Ellsworth Air Force Base (8.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    61.4 °F
Get WillyWeather+ to remove ads