Mystic Weather Forecast

    • 17
    • 33

    Chance Snow

    • 13
    • 37

    Chance Rain/Snow

    • 21
    • 38

    Chance Snow

    • 24
    • 42

    Partly Sunny

    • 22
    • 46

    Chance Snow

    • 21
    • 36

    Chance Snow

Today 5 Dec Northern Black Hills

Mostly cloudy with a 50 percent chance of snow. Additional snow accumulation around an inch possible. Highs in the upper 20s. Northwest Winds 10 to 15 Mph with Gusts up to 35 Mph.

Tonight 5 Dec Northern Black Hills

Snow with a chance of freezing rain. Snow accumulation around an inch. Additional ice accumulation around a trace. Near steady temperature in the upper 20s. Northwest Winds 10 to 15 Mph with Gusts up to 35 Mph. Chance of precipitation 90 percent.

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Mystic Temperature Statistics

December Temperature

Custer, Custer County Airport (23.6 miles)

  • Lowest 1 December, 2025

    7 °F

  • Average December

    25.1 °F

  • Highest 2 December, 2025

    34 °F

Climate (2020–Present)

Custer, Custer County Airport (23.6 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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