Saint Marys Lake Weather Forecast

    • 49
    • 72

    Mostly Sunny

    • 56
    • 77

    Sunny

    • 61
    • 82

    Sunny

    • 61
    • 85

    Sunny

    • 60
    • 83

    Mostly Sunny

    • 58
    • 80

    Mostly Sunny

Today 4 Aug Potomac/Seeley Lake Region

Mostly sunny. Patchy smoke until late afternoon. Highs in the 70s.

Tonight 4 Aug Potomac/Seeley Lake Region

Mostly clear. Patchy smoke. Lows in the upper 30s to mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Marys Lake Temperature Statistics

August Temperature

Missoula, Missoula International Airport (24.9 miles)

  • Lowest 1 August, 2026

    58.6 °F

  • Average August

    73.1 °F

  • Highest 1 August, 2026

    96.7 °F

Climate (2021–2026)

Missoula, Missoula International Airport (24.9 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.5 °F

  • Average High 2021–2026

    59.7 °F
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