Dewey Lake Weather Forecast

    • 50
    • 66

    Mostly Cloudy

    • 50
    • 67

    Mostly Cloudy

    • 47
    • 70

    Partly Sunny

    • 46
    • 68

    Mostly Sunny

    • 46
    • 67

    Partly Sunny

    • 49
    • 68

    Mostly Cloudy

    • 52
    • 70

    Partly Sunny

Today 22 Sep Cass

Partly cloudy. A slight chance of Showers in the afternoon. Highs in the lower 70s. Chance of rain 20 percent.

Tonight 22 Sep Cass

Mostly cloudy. Lows in the lower 50s. Northeast Winds around 10 Mph. Gusts up to 20 Mph.

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  • Temperature Real-Time

Dewey Lake Temperature Statistics

September Temperature

Southwest Michigan Regional Airport (12.4 miles)

  • Lowest 14 September, 2026

    45.6 °F

  • Average September

    71.2 °F

  • Highest 2 September, 2026

    95.6 °F

Climate (2021–2026)

Southwest Michigan Regional Airport (12.4 miles)

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  • Average Low 2021–2026

    43.2 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    60.7 °F
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