Mount Rushmore National Memorial Weather Forecast

    • 65
    • 88

    Slight Chance Thunderstorms

    • 65
    • 85

    Slight Chance Thunderstorms

    • 64
    • 81

    Chance Thunderstorms

    • 63
    • 84

    Chance Thunderstorms

    • 64
    • 83

    Slight Chance Thunderstorms

    • 64
    • 85

    Mostly Sunny

Today 14 Aug Central Black Hills

Mostly sunny with a slight chance of Showers and Thunderstorms. Highs in the mid 80s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

Tonight 14 Aug Central Black Hills

Partly cloudy with a slight chance of Showers and Thunderstorms. Lows around 60. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Rushmore National Memorial Temperature Statistics

August Temperature

Custer, Custer County Airport (12.4 miles)

  • Lowest 9 August, 2025

    44.7 °F

  • Average August

    65.4 °F

  • Highest 7 August, 2025

    92.6 °F

Climate (2020–Present)

Custer, Custer County Airport (12.4 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    56.2 °F
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