McDonald Lake Weather Forecast

    • 49
    • 64

    Mostly Sunny

    • 46
    • 64

    Rain

    • 35
    • 49

    Rain

    • 36
    • 48

    Mostly Cloudy

    • 34
    • 48

    Mostly Cloudy

    • 35
    • 48

    Chance Rain/Snow

Today 21 Oct Potomac/Seeley Lake Region

Partly cloudy. A 20 percent chance of snow in the morning. Highs in the 40s.

Tonight 21 Oct Potomac/Seeley Lake Region

Mostly clear. Lows in the mid 30s to lower 40s.

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  • Temperature Real-Time

McDonald Lake Temperature Statistics

October Temperature

Missoula, Missoula International Airport (34.8 miles)

  • Lowest 15 October, 2026

    25.6 °F

  • Average October

    50.2 °F

  • Highest 5 October, 2026

    81.6 °F

Climate (2021–2026)

Missoula, Missoula International Airport (34.8 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.8 °F
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