Black Hills National Forest Weather Forecast

    • 49
    • 78

    Gradual Clearing

    • 44
    • 69

    Mostly Sunny

    • 47
    • 66

    Mostly Sunny

    • 52
    • 75

    Mostly Sunny

    • 47
    • 73

    Partly Sunny

    • 41
    • 64

    Chance Rain Showers

Today 7 Sep Northern Black Hills

Mostly cloudy in the Morning, then clearing. Highs in the lower 80s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 7 Sep Northern Black Hills

Mostly clear. Lows in the upper 40s. West Winds 5 to 10 Mph. Gusts up to 30 Mph in the evening.

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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 2 September, 2026

    51.7 °F

  • Average September

    68 °F

  • Highest 4 September, 2026

    84.9 °F

Climate (2021–2026)

Custer, Custer County Airport (16.8 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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