Mystic Weather Forecast

    • 37
    • 56

    Increasing Clouds

    • 30
    • 56

    Mostly Sunny

    • 34
    • 61

    Mostly Sunny

    • 40
    • 55

    Mostly Cloudy

    • 39
    • 62

    Partly Sunny

    • 37
    • 60

    Rain Likely

Today 27 Oct Northern Black Hills

Sunny. Highs in the lower 50s. West Winds 5 to 10 Mph with Gusts up to 30 Mph.

Tonight 27 Oct Northern Black Hills

Partly cloudy in the Evening, then mostly cloudy with a slight chance of rain Showers after midnight. Lows in the mid 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

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Mystic Temperature Statistics

October Temperature

Custer, Custer County Airport (23.6 miles)

  • Lowest 16 October, 2026

    26.7 °F

  • Average October

    51.8 °F

  • Highest 5 October, 2026

    81.6 °F

Climate (2021–2026)

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

    57 °F
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