Dewey Weather Forecast

    • 13
    • 42

    Mostly Sunny

    • 15
    • 42

    Mostly Sunny

    • 17
    • 45

    Mostly Sunny

    • 17
    • 46

    Sunny

    • 24
    • 46

    Partly Sunny

    • 21
    • 48

    Mostly Cloudy

    • 10
    • 36

    Mostly Cloudy

Today 27 Jan Southern Black Hills

Sunny. Near steady temperature in the upper 30s. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 27 Jan Southern Black Hills

Clear. Lows in the mid 20s. Northwest Winds 10 to 15 Mph.

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Dewey Temperature Statistics

January Temperature

Custer, Custer County Airport (24.9 miles)

  • Lowest 20 January, 2025

    -15.3 °F

  • Average January

    17.8 °F

  • Highest 16 January, 2025

    44.7 °F

Climate (2020–Present)

Custer, Custer County Airport (24.9 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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