Mystic Weather Forecast

    • 29
    • 45

    Chance Rain/Snow

    • 30
    • 54

    Mostly Sunny

    • 31
    • 58

    Mostly Sunny

    • 34
    • 62

    Mostly Sunny

    • 39
    • 64

    Mostly Sunny

    • 38
    • 66

    Mostly Cloudy

    • 31
    • 57

    Chance Rain/Snow

Today 20 Oct Northern Black Hills

Partly cloudy with scattered rain Showers, snow Showers and isolated Thunderstorms. Highs in the 30s to mid 40s. Northwest Winds 15 to 20 Mph with Gusts up to 45 Mph. Chance of precipitation 40 percent.

Tonight 20 Oct Northern Black Hills

Mostly clear. Lows in the upper 20s. Northwest Winds 10 to 20 Mph with Gusts up to 45 Mph.

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Mystic Temperature Statistics

October Temperature

Custer, Custer County Airport (23.6 miles)

  • Lowest 13 October, 2025

    26.1 °F

  • Average October

    49.5 °F

  • Highest 3 October, 2025

    81 °F

Climate (2020–Present)

Custer, Custer County Airport (23.6 miles)

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  • Average Low 2020–2025

    33.2 °F

  • Average 2020–2025

    44.8 °F

  • Average High 2020–2025

    56.2 °F
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