Cornwall Lake Weather Forecast

    • 42
    • 70

    Increasing Clouds

    • 39
    • 70

    Mostly Sunny

    • 39
    • 72

    Mostly Sunny

    • 41
    • 72

    Mostly Sunny

    • 42
    • 73

    Mostly Sunny

    • 50
    • 75

    Chance Rain Showers

Today 24 Sep Cheboygan

Mostly sunny. Highs around 70. East Winds 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.

Tonight 24 Sep Cheboygan

Partly cloudy early then becoming mostly cloudy. Lows in the lower 40s. Southeast Winds up to 10 Mph. Gusts up to 20 Mph early.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornwall Lake Temperature Statistics

September Temperature

Gaylord Regional Airport (19.9 miles)

  • Lowest 22 September, 2026

    42.1 °F

  • Average September

    61.7 °F

  • Highest 1 September, 2026

    86.6 °F

Climate (2021–2026)

Gaylord Regional Airport (19.9 miles)

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  • Average Low 2021–2026

    37.5 °F

  • Average 2021–2026

    46.6 °F

  • Average High 2021–2026

    55.4 °F
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