Harney Peak Weather Forecast

    • 47
    • 61

    Rain Showers Likely

    • 46
    • 54

    Rain Showers

    • 43
    • 55

    Chance Rain Showers

    • 43
    • 57

    Slight Chance Thunderstorms

    • 48
    • 65

    Mostly Sunny

    • 48
    • 70

    Partly Sunny

Today 16 Sep Central Black Hills

Partly cloudy with a slight chance of Showers in the Morning, then mostly cloudy with a chance of Showers and Thunderstorms in the afternoon. Highs in the upper 60s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph in the afternoon. Chance of rain 50 percent.

Tonight 16 Sep Central Black Hills

Partly cloudy with isolated Showers. Lows in the upper 40s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

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Harney Peak Temperature Statistics

September Temperature

Custer, Custer County Airport (9.9 miles)

  • Lowest 6 September, 2025

    32 °F

  • Average September

    60.7 °F

  • Highest 11 September, 2025

    82.9 °F

Climate (2020–Present)

Custer, Custer County Airport (9.9 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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