Black Hills National Forest Weather Forecast

    • 50
    • 62

    Thunderstorms

    • 50
    • 71

    Chance Thunderstorms

    • 51
    • 74

    Chance Thunderstorms

    • 50
    • 70

    Chance Thunderstorms

    • 53
    • 74

    Slight Chance Thunderstorms

    • 53
    • 78

    Slight Chance Thunderstorms

Today 31 Jul Northern Black Hills

Mostly cloudy. Scattered Showers and isolated Thunderstorms this Morning, then a slight chance of Showers and Thunderstorms this afternoon. Areas of smoke this afternoon. Highs in the upper 60s. Southeast Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 31 Jul Northern Black Hills

Mostly cloudy. Scattered Showers and Thunderstorms in the Evening, then isolated Showers and Thunderstorms after midnight. Areas of smoke. Lows in the upper 40s. South Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

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Black Hills National Forest Temperature Statistics

July Temperature

Custer, Custer County Airport (16.8 miles)

  • Lowest 12 July, 2025

    38.6 °F

  • Average July

    66.6 °F

  • Highest 9 July, 2025

    90.6 °F

Climate (2020–Present)

Custer, Custer County Airport (16.8 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    56.2 °F
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