Dewey Weather Forecast

    • 55
    • 75

    Severe Tstms

    • 53
    • 75

    Rain Showers Likely

    • 52
    • 71

    Rain Showers Likely

    • 53
    • 69

    Rain Showers Likely

    • 59
    • 81

    Slight Chance Thunderstorms

    • 57
    • 88

    Chance Thunderstorms

    • 52
    • 79

    Chance Thunderstorms

Today 22 Jun Southern Black Hills

Showers and Thunderstorms likely. Some Thunderstorms may be severe. Near steady temperature in the upper 60s. East Winds 5 to 10 Mph with Gusts up to 30 Mph. Chance of rain 60 percent.

Tonight 22 Jun Southern Black Hills

Partly cloudy this Evening, then becoming mostly cloudy. A chance of Showers. A chance of Thunderstorms. Some Thunderstorms may be severe with damaging Winds and large hail this evening. Lows in the mid 50s. Northeast Winds 10 to 15 Mph. Gusts up to 25 Mph this evening. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dewey Temperature Statistics

June Temperature

Custer, Custer County Airport (24.9 miles)

  • Lowest 14 June, 2026

    33.7 °F

  • Average June

    58.2 °F

  • Highest 7 June, 2026

    86.6 °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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