Dewey Lake Weather Forecast

    • 55
    • 81

    Increasing Clouds

    • 51
    • 72

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 63
    • 83

    Mostly Sunny

    • 63
    • 86

    Slight Chance Thunderstorms

Today 21 Jul Cass

Partly cloudy with a chance of Showers with a slight chance of Thunderstorms this Morning, then mostly sunny this afternoon. Highs in the lower 80s. West Winds 10 to 15 Mph, becoming northwest this afternoon. Gusts up to 30 Mph. Chance of rain 40 percent.

Tonight 21 Jul Cass

Mostly clear. Less humid with Lows in the mid 50s. North Winds 10 to 15 Mph. Gusts up to 30 Mph, decreasing to 20 Mph after midnight.

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Dewey Lake Temperature Statistics

July Temperature

Southwest Michigan Regional Airport (12.4 miles)

  • Lowest 8 July, 2026

    55.7 °F

  • Average July

    76.4 °F

  • Highest 1 July, 2026

    92.6 °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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