Rapid City Weather Forecast

    • 62
    • 83

    Chance Thunderstorms

    • 57
    • 77

    Chance Thunderstorms

    • 59
    • 80

    Chance Thunderstorms

    • 61
    • 86

    Slight Chance Thunderstorms

    • 58
    • 84

    Chance Thunderstorms

    • 57
    • 80

    Chance Thunderstorms

Today 14 Aug Rapid City

Cloudy this Morning, then becoming partly cloudy. Areas of fog this morning. A slight chance of Showers. A slight chance of Thunderstorms this afternoon. Highs in the lower 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 14 Aug Rapid City

Partly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. North Winds 5 to 10 Mph with Gusts up to 20 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 4 August, 2026

    49.3 °F

  • Average August

    75.4 °F

  • Highest 2 August, 2026

    103.8 °F

Climate (2021–2026)

Ellsworth Air Force Base (8.1 miles)

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  • Average Low 2021–2026

    38 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    61.3 °F
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