Mackinac Island Weather Forecast

    • 47
    • 57

    Increasing Clouds

    • 43
    • 54

    Rain Showers

    • 40
    • 50

    Rain Showers

    • 39
    • 47

    Rain Showers

    • 40
    • 48

    Chance Rain Showers

    • 42
    • 51

    Mostly Cloudy

Today 20 Oct Mackinac Island/Bois Blanc Island

Partly sunny. Highs in the upper 50s. West Winds 5 to 10 Mph.

Tonight 20 Oct Mackinac Island/Bois Blanc Island

Mostly cloudy. Lows in the mid 40s. Northwest Winds 10 to 15 Mph with Gusts to around 25 Mph.

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Mackinac Island Temperature Statistics

October Temperature

Mackinac Island Airport (0 miles)

  • Lowest 8 October, 2025

    39.2 °F

  • Average October

    56.7 °F

  • Highest 4 October, 2025

    78.8 °F

Climate (2020–Present)

Mackinac Island Airport (0 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    44.9 °F

  • Average High 2020–2025

    51.3 °F
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