Mystic Weather Forecast

    • 24
    • 50

    Rain Showers

    • 26
    • 50

    Partly Sunny

    • 32
    • 56

    Mostly Sunny

    • 36
    • 66

    Partly Sunny

    • 36
    • 61

    Chance Rain Showers

    • 39
    • 65

    Partly Sunny

Today 29 Apr Northern Black Hills

Partly cloudy with scattered rain Showers with a chance of snow Showers. Little or no snow accumulation. Near steady temperature in the mid 40s. Northwest Winds 5 to 10 Mph with Gusts up to 30 Mph. Chance of precipitation 50 percent.

Tonight 29 Apr Northern Black Hills

Partly cloudy in the Evening, then clearing. Lows in the lower 20s. Northwest Winds 5 to 10 Mph. Gusts up to 30 Mph in the evening.

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Mystic Temperature Statistics

April Temperature

Custer, Custer County Airport (23.6 miles)

  • Lowest 7 April, 2026

    20.6 °F

  • Average April

    40.2 °F

  • Highest 11 April, 2026

    72.6 °F

Climate (2021–Present)

Custer, Custer County Airport (23.6 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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