Flat Rock Weather Forecast

    • 45
    • 66

    Decreasing Clouds

    • 43
    • 69

    Partly Sunny

    • 50
    • 69

    Mostly Sunny

    • 53
    • 75

    Partly Sunny

    • 56
    • 80

    Partly Sunny

    • 51
    • 76

    Mostly Sunny

Today 6 Sep Wayne

Partly cloudy in the Morning, then mostly cloudy with a slight chance of Showers in the afternoon. Highs in the mid 60s. West Winds 5 to 15 Mph. Chance of rain 20 percent.

Tonight 6 Sep Wayne

Partly cloudy with a 20 percent chance of Showers. Lows in the mid 40s. West Winds 5 to 10 Mph.

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Flat Rock Temperature Statistics

September Temperature

Detroit/Grosse Ile, Grosse Ile Airport (6.2 miles)

  • Lowest 1 September, 2025

    53.6 °F

  • Average September

    66.7 °F

  • Highest 3 September, 2025

    82.4 °F

Climate (2020–Present)

Detroit/Grosse Ile, Grosse Ile Airport (6.2 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.4 °F

  • Average High 2020–2025

    58.9 °F
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