Keystone Weather Forecast

    • 36
    • 52

    Decreasing Clouds

    • 28
    • 55

    Partly Sunny

    • 11
    • 33

    Mostly Cloudy

    • 6
    • 16

    Chance Snow

    • 7
    • 21

    Slight Chance Snow

    • 5
    • 23

    Chance Snow

Today 31 Jan Central Black Hills

Mostly sunny this Morning, then becoming partly cloudy. Highs in the upper 40s. West Winds 5 to 10 Mph.

Tonight 31 Jan Central Black Hills

Partly cloudy. Lows in the lower 30s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Keystone Temperature Statistics

January Temperature

Custer, Custer County Airport (14.9 miles)

  • Lowest 20 January, 2025

    -15.3 °F

  • Average January

    19 °F

  • Highest 28 January, 2025

    53.1 °F

Climate (2020–Present)

Custer, Custer County Airport (14.9 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    44.7 °F

  • Average High 2020–2025

    55.9 °F
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