Saint Marys Lake Weather Forecast

    • 67
    • 84

    Becoming Sunny

    • 73
    • 88

    Partly Sunny

    • 66
    • 89

    Rain Showers Likely

    • 65
    • 86

    Slight Chance Thunderstorms

    • 66
    • 87

    Partly Sunny

    • 66
    • 87

    Partly Sunny

Today 22 Jul Mason

Sunny. Highs in the mid 80s. Southeast Winds 5 to 10 Mph becoming south in the afternoon. Gusts up to 20 Mph.

Tonight 22 Jul Mason

Partly cloudy. Lows in the upper 50s. Southeast Winds 5 to 10 Mph.

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Saint Marys Lake Temperature Statistics

July Temperature

Ludington, Mason County Airport (9.9 miles)

  • Lowest 18 July, 2025

    44.6 °F

  • Average July

    70.1 °F

  • Highest 5 July, 2025

    87.8 °F

Climate (2020–Present)

Ludington, Mason County Airport (9.9 miles)

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  • Average Low 2020–2025

    40 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    56.3 °F
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