Saint Marys Lake Weather Forecast

    • 38
    • 52

    Mostly Sunny

    • 39
    • 59

    Mostly Sunny

    • 39
    • 53

    Partly Sunny

    • 43
    • 58

    Rain

    • 35
    • 47

    Rain/Snow

    • 31
    • 39

    Snow

    • 29
    • 37

    Snow Likely

Today 21 Oct Potomac/Seeley Lake Region

Partly cloudy. Patchy fog early in the morning. Highs in the upper 40s to mid 50s.

Tonight 21 Oct Potomac/Seeley Lake Region

Mostly clear. Patchy fog after midnight. Lows in the mid 20s to lower 30s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Marys Lake Temperature Statistics

October Temperature

Missoula, Missoula International Airport (24.9 miles)

  • Lowest 6 October, 2025

    27 °F

  • Average October

    46.5 °F

  • Highest 10 October, 2025

    81 °F

Climate (2020–Present)

Missoula, Missoula International Airport (24.9 miles)

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  • Average Low 2020–2025

    35.6 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    59.3 °F
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