Custer State Park Weather Forecast

    • 51
    • 68

    Mostly Sunny

    • 47
    • 71

    Partly Sunny

    • 43
    • 57

    Partly Sunny

    • 50
    • 63

    Mostly Sunny

    • 44
    • 64

    Mostly Sunny

    • 48
    • 61

    Mostly Sunny

Today 29 Sep Central Black Hills

Sunny. Highs in the upper 60s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 29 Sep Central Black Hills

Mostly clear. Lows in the upper 40s. Southwest Winds 5 to 10 Mph.

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Custer State Park Temperature Statistics

September Temperature

Custer, Custer County Airport (8.7 miles)

  • Lowest 15 September, 2026

    39.7 °F

  • Average September

    60.5 °F

  • Highest 4 September, 2026

    86.6 °F

Climate (2021–2026)

Custer, Custer County Airport (8.7 miles)

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  • Average Low 2021–2026

    33.6 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    56.9 °F
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