Dewey Weather Forecast

    • 31
    • 57

    Rain Showers

    • 37
    • 64

    Mostly Sunny

    • 46
    • 74

    Sunny

    • 47
    • 77

    Mostly Sunny

    • 43
    • 68

    Rain Showers Likely

    • 41
    • 58

    Rain Showers Likely

    • 42
    • 64

    Chance Rain Showers

Today 1 May Southern Black Hills

Partly cloudy with numerous Showers and scattered Thunderstorms. Highs in the mid 50s. Northwest Winds 15 to 20 Mph with Gusts up to 40 Mph. Chance of rain 60 percent.

Tonight 1 May Southern Black Hills

Partly cloudy with scattered rain Showers and isolated Thunderstorms this Evening, then clear after midnight. Lows in the lower 30s. Northwest Winds 10 to 15 Mph. Gusts up to 30 Mph this evening. Chance of rain 40 percent.

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Dewey Temperature Statistics

May Temperature

Custer, Custer County Airport (24.9 miles)

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  • Average May

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Climate (2020–Present)

Custer, Custer County Airport (24.9 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    44.8 °F

  • Average High 2020–2025

    56.1 °F
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