Cornwall Lake Weather Forecast

    • 43
    • 71

    Becoming Sunny

    • 56
    • 79

    Mostly Sunny

    • 50
    • 81

    Mostly Cloudy

    • 48
    • 71

    Chance Rain Showers

    • 55
    • 70

    Rain Showers

    • 47
    • 70

    Mostly Cloudy

Today 10 Sep Cheboygan

Mostly sunny. Highs in the lower 70s. Northwest Winds 5 to 15 Mph.

Tonight 10 Sep Cheboygan

Clear. Patchy fog. Lows in the mid 40s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornwall Lake Temperature Statistics

September Temperature

Gaylord Regional Airport (19.9 miles)

  • Lowest 6 September, 2026

    46.7 °F

  • Average September

    67 °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

    37.6 °F

  • Average 2021–2026

    46.6 °F

  • Average High 2021–2026

    55.5 °F
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