Black Hills National Forest Weather Forecast

    • 44
    • 60

    Chance Thunderstorms

    • 44
    • 70

    Chance Rain Showers

    • 40
    • 63

    Chance Thunderstorms

    • 39
    • 58

    Chance Thunderstorms

    • 39
    • 59

    Slight Chance Thunderstorms

    • 41
    • 62

    Partly Sunny

Today 14 Sep Northern Black Hills

Cloudy with a chance of Showers and Thunderstorms. Highs in the lower 60s. Northwest Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 14 Sep Northern Black Hills

Becoming partly cloudy. Lows in the upper 40s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Black Hills National Forest Temperature Statistics

September Temperature

Custer, Custer County Airport (16.8 miles)

  • Lowest 6 September, 2025

    32 °F

  • Average September

    60.6 °F

  • Highest 11 September, 2025

    82.9 °F

Climate (2020–Present)

Custer, Custer County Airport (16.8 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    44.8 °F

  • Average High 2020–2025

    56.2 °F
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