Dewey Weather Forecast

    • 64
    • 90

    Areas Smoke

    • 64
    • 99

    Smoke

    • 63
    • 96

    Mostly Sunny

    • 62
    • 93

    Chance Thunderstorms

    • 61
    • 90

    Chance Thunderstorms

    • 58
    • 85

    Thunderstorms Likely

Today 7 Aug Southern Black Hills

Mostly sunny. Areas of smoke. Highs in the mid 80s. East Winds 5 to 10 Mph. Gusts up to 25 Mph this afternoon.

Tonight 7 Aug Southern Black Hills

Clear. Lows in the lower 60s. East Winds 10 to 15 Mph with Gusts up to 30 Mph.

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  • Temperature Real-Time

Dewey Temperature Statistics

August Temperature

Custer, Custer County Airport (24.9 miles)

  • Lowest 4 August, 2026

    42.1 °F

  • Average August

    67.2 °F

  • Highest 2 August, 2026

    93.7 °F

Climate (2021–2026)

Custer, Custer County Airport (24.9 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    45.3 °F

  • Average High 2021–2026

    56.9 °F
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