Saint Marys Lake Weather Forecast

    • 40
    • 47

    Rain Likely

    • 42
    • 51

    Chance Rain

    • 44
    • 56

    Mostly Cloudy

    • 42
    • 62

    Rain Likely

    • 29
    • 48

    Chance Rain

    • 31
    • 46

    Partly Sunny

    • 35
    • 51

    Chance Rain/Snow

Today 17 Mar Potomac/Seeley Lake Region

Mostly cloudy with a 50 percent chance of Areas of rain. Highs in the mid 40s to lower 50s. Windy with southwest Winds 20 to 30 Mph.

Tonight 17 Mar Potomac/Seeley Lake Region

Mostly cloudy with a 40 percent chance of Areas of rain. Lows in the 30s to lower 40s. West Winds to 15 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Marys Lake Temperature Statistics

March Temperature

Missoula, Missoula International Airport (24.9 miles)

  • Lowest 15 March, 2026

    18 °F

  • Average March

    37.8 °F

  • Highest 3 March, 2026

    60.7 °F

Climate (2021–Present)

Missoula, Missoula International Airport (24.9 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.7 °F
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