Rapid City Weather Forecast

    • 56
    • 78

    Thunderstorms Likely

    • 54
    • 77

    Partly Sunny

    • 50
    • 74

    Mostly Sunny

    • 52
    • 74

    Slight Chance Thunderstorms

    • 54
    • 77

    Slight Chance Thunderstorms

    • 57
    • 80

    Slight Chance Thunderstorms

Today 22 Aug Rapid City

Mostly cloudy. Showers and Thunderstorms likely in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Highs in the upper 70s. North Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 22 Aug Rapid City

A chance of Thunderstorms in the evening. Partly cloudy with a chance of Showers. Lows in the mid 50s. North Winds 5 to 10 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rapid City Temperature Statistics

August Temperature

Ellsworth Air Force Base (8.1 miles)

  • Lowest 9 August, 2025

    52.3 °F

  • Average August

    73.2 °F

  • Highest 14 August, 2025

    96.6 °F

Climate (2020–Present)

Ellsworth Air Force Base (8.1 miles)

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  • Average Low 2020–2025

    37.4 °F

  • Average 2020–2025

    49 °F

  • Average High 2020–2025

    60.7 °F
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