Dewey Lake Weather Forecast

    • 62
    • 68

    Rain Showers

    • 57
    • 72

    Rain Showers

    • 42
    • 66

    Chance Rain Showers

    • 43
    • 66

    Partly Sunny

    • 42
    • 65

    Mostly Sunny

    • 39
    • 61

    Mostly Sunny

Today 30 Sep Cass

Mostly cloudy. Showers in the afternoon. Highs in the upper 60s. South Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 90 percent.

Tonight 30 Sep Cass

A chance of Showers in the Evening, then Showers likely after midnight. Near steady temperature in the mid 60s. South Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening. Chance of rain 70 percent.

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  • Temperature Real-Time

Dewey Lake Temperature Statistics

September Temperature

Southwest Michigan Regional Airport (12.4 miles)

  • Lowest 27 September, 2026

    39.9 °F

  • Average September

    67.8 °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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