Custer State Park Weather Forecast

    • 38
    • 61

    Mostly Sunny

    • 43
    • 67

    Mostly Sunny

    • 57
    • 75

    Partly Sunny

    • 55
    • 79

    Partly Sunny

    • 54
    • 77

    Partly Sunny

    • 56
    • 74

    Chance Rain Showers

Today 5 Sep Central Black Hills

Sunny. Highs around 60. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 5 Sep Central Black Hills

Clear. Patchy frost after midnight. Lows in the mid 30s. Northwest Winds 5 to 10 Mph.

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Custer State Park Temperature Statistics

September Temperature

Custer, Custer County Airport (8.7 miles)

  • Lowest 1 September, 2025

    43 °F

  • Average September

    62.7 °F

  • Highest 2 September, 2025

    78.1 °F

Climate (2020–Present)

Custer, Custer County Airport (8.7 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    56.1 °F
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