St Ignace Weather Forecast

    • 43
    • 62

    Sunny

    • 44
    • 63

    Mostly Sunny

    • 44
    • 64

    Mostly Sunny

    • 44
    • 68

    Mostly Sunny

    • 45
    • 67

    Partly Sunny

    • 49
    • 68

    Mostly Cloudy

Today 22 Sep Eastern Mackinac

Sunny. Highs in the lower 60s. East Winds 5 to 15 Mph with Gusts to around 25 Mph.

Tonight 22 Sep Eastern Mackinac

Clear. Patchy frost after midnight. Lows in the upper 30s. East Winds up to 10 Mph with Gusts to around 20 Mph.

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St Ignace Temperature Statistics

September Temperature

Mackinac Island Airport (4.3 miles)

  • Lowest 18 September, 2026

    46.4 °F

  • Average September

    62.6 °F

  • Highest 1 September, 2026

    78.8 °F

Climate (2021–2026)

Mackinac Island Airport (4.3 miles)

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  • Average Low 2021–2026

    38.1 °F

  • Average 2021–2026

    44.5 °F

  • Average High 2021–2026

    50.9 °F
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