Custer State Park Weather Forecast

    • 43
    • 50

    Partly Sunny

    • 31
    • 62

    Partly Sunny

    • 43
    • 53

    Mostly Cloudy

    • 45
    • 60

    Partly Sunny

    • 35
    • 56

    Partly Sunny

    • 29
    • 52

    Mostly Sunny

Today 21 Dec Central Black Hills

Partly cloudy. A chance of Sprinkles in the afternoon. Highs in the upper 40s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 21 Dec Central Black Hills

Partly cloudy. Not as cool with Lows in the lower 40s. West Winds 10 to 20 Mph. Gusts up to 30 Mph, increasing to 40 Mph after midnight.

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Custer State Park Temperature Statistics

December Temperature

Custer, Custer County Airport (8.7 miles)

  • Lowest 1 December, 2025

    7 °F

  • Average December

    31.1 °F

  • Highest 14 December, 2025

    57 °F

Climate (2020–Present)

Custer, Custer County Airport (8.7 miles)

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  • Average Low 2020–2025

    33.3 °F

  • Average 2020–2025

    44.9 °F

  • Average High 2020–2025

    56.2 °F
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