Rapid City Weather Forecast

    • 50
    • 80

    Partly Sunny

    • 37
    • 66

    Rain Showers

    • 34
    • 42

    Rain/Snow

    • 34
    • 53

    Mostly Cloudy

    • 42
    • 66

    Slight Chance Thunderstorms

    • 44
    • 69

    Slight Chance Thunderstorms

Today 16 May Rapid City

Mostly sunny this Morning, then becoming partly cloudy. Highs in the upper 70s. South Winds 5 to 10 Mph, increasing to southeast 15 to 20 Mph this afternoon. Gusts up to 30 Mph.

Tonight 16 May Rapid City

A slight chance of Thunderstorms in the evening. Showers. Lows in the upper 40s. Southeast Winds 10 to 20 Mph with Gusts up to 35 Mph, becoming south 5 to 10 Mph with Gusts up to 20 Mph after midnight. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rapid City Temperature Statistics

May Temperature

Ellsworth Air Force Base (8.1 miles)

  • Lowest 6 May, 2026

    25.5 °F

  • Average May

    56.5 °F

  • Highest 13 May, 2026

    92.1 °F

Climate (2021–Present)

Ellsworth Air Force Base (8.1 miles)

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  • Average Low 2021–2026

    37.9 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    61.3 °F
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