Dewey Lake Weather Forecast

    • 64
    • 80

    Rain Showers Likely

    • 55
    • 78

    Partly Sunny

    • 56
    • 79

    Mostly Sunny

    • 61
    • 79

    Chance Rain Showers

    • 57
    • 77

    Slight Chance Thunderstorms

    • 55
    • 75

    Partly Sunny

Today 18 Aug Cass

Partly cloudy. Highs around 80. West Winds 5 to 10 Mph. Gusts up to 20 Mph this afternoon.

Tonight 18 Aug Cass

Showers likely with a chance of Thunderstorms. Lows in the mid 60s. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dewey Lake Temperature Statistics

August Temperature

Southwest Michigan Regional Airport (12.4 miles)

  • Lowest 9 August, 2026

    55.7 °F

  • Average August

    73.1 °F

  • Highest 7 August, 2026

    87.7 °F

Climate (2021–2026)

Southwest Michigan Regional Airport (12.4 miles)

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  • Average Low 2021–2026

    43.3 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    60.8 °F
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