Mystic Weather Forecast

    • 60
    • 87

    Chance Thunderstorms

    • 59
    • 89

    Thunderstorms Likely

    • 55
    • 85

    Rain Showers Likely

    • 58
    • 86

    Chance Thunderstorms

    • 65
    • 90

    Mostly Sunny

    • 62
    • 98

    Hot

    • 51
    • 84

    Slight Chance Rain Showers

Today 28 Jul Northern Black Hills

Partly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the lower 80s. East Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 28 Jul Northern Black Hills

Mostly clear with a slight chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Lows in the upper 50s. South Winds 5 to 10 Mph. Gusts up to 20 Mph this evening. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mystic Temperature Statistics

July Temperature

Custer, Custer County Airport (23.6 miles)

  • Lowest 3 July, 2026

    50.6 °F

  • Average July

    71.3 °F

  • Highest 25 July, 2026

    96.7 °F

Climate (2021–2026)

Custer, Custer County Airport (23.6 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    45.3 °F

  • Average High 2021–2026

    56.9 °F
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