Mystic Weather Forecast

    • 22
    • 37

    Mostly Sunny

    • 21
    • 44

    Snow Likely

    • 17
    • 37

    Snow Likely

    • 14
    • 31

    Chance Snow

    • 24
    • 42

    Slight Chance Rain/Snow

    • 21
    • 43

    Partly Sunny

    • 24
    • 50

    Mostly Cloudy

Today 27 Jan Northern Black Hills

Partly cloudy. Highs in the lower 30s. Northwest Winds 5 to 10 Mph with Gusts up to 30 Mph.

Tonight 27 Jan Northern Black Hills

Mostly clear. Lows 15 to 20. West Winds 5 to 10 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mystic Temperature Statistics

January Temperature

Custer, Custer County Airport (23.6 miles)

  • Lowest 23 January, 2026

    -11 °F

  • Average January

    27.1 °F

  • Highest 1 January, 2026

    56.6 °F

Climate (2021–Present)

Custer, Custer County Airport (23.6 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    44.9 °F

  • Average High 2021–2026

    56.3 °F
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