Heinz Lake Weather Forecast

    • 61
    • 75

    Thunderstorms

    • 53
    • 73

    Rain Showers

    • 50
    • 66

    Rain Showers

    • 48
    • 60

    Isolated Thunderstorms

    • 49
    • 67

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

Today 22 Aug Western Mackinac

Partly sunny. Isolated rain Showers in the afternoon. Highs in the mid 70s. Southwest Winds 5 to 15 Mph with Gusts to around 25 Mph. Chance of Showers 20 percent.

Tonight 22 Aug Western Mackinac

Partly cloudy. Lows in the lower 60s. Light Winds.

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Heinz Lake Temperature Statistics

August Temperature

Manistique, Schoolcraft County Airport (16.2 miles)

  • Lowest 1 August, 2025

    45.9 °F

  • Average August

    68.3 °F

  • Highest 3 August, 2025

    81.9 °F

Climate (2020–Present)

Manistique, Schoolcraft County Airport (16.2 miles)

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  • Average Low 2020–2025

    35.2 °F

  • Average 2020–2025

    43.8 °F

  • Average High 2020–2025

    51.6 °F
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