Saint Marys Lake Weather Forecast

    • 58
    • 86

    Increasing Clouds

    • 56
    • 83

    Partly Sunny

    • 57
    • 80

    Slight Chance Rain Showers

    • 60
    • 82

    Chance Rain Showers

    • 59
    • 77

    Chance Thunderstorms

    • 55
    • 77

    Chance Rain Showers

Today 18 Sep Calhoun

Sunny. Highs in the mid 80s. Light Winds.

Tonight 18 Sep Calhoun

Partly cloudy. Patchy fog after midnight. Lows in the upper 50s. Light Winds.

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Saint Marys Lake Temperature Statistics

September Temperature

W K Kellogg Airport (5 miles)

  • Lowest 8 September, 2025

    41 °F

  • Average September

    61.5 °F

  • Highest 14 September, 2025

    82.9 °F

Climate (2020–Present)

W K Kellogg Airport (5 miles)

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  • Average Low 2020–2025

    42.8 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    60.7 °F
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