McDonald Lake Weather Forecast

    • 50
    • 69

    Rain Showers

    • 50
    • 53

    Rain

    • 50
    • 62

    Rain Likely

    • 54
    • 70

    Mostly Sunny

    • 55
    • 73

    Partly Sunny

    • 50
    • 67

    Chance Rain

Today 6 Sep Potomac/Seeley Lake Region

Mostly cloudy. Areas of rain early in the morning. Chance of rain Showers and a slight chance of Thunderstorms late in the afternoon. Chance of precipitation 50 percent. Highs in the mid 60s to lower 70s.

Tonight 6 Sep Potomac/Seeley Lake Region

Rain Showers likely. Chance of Thunderstorms. Chance of precipitation near 100 percent. Lows in the 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McDonald Lake Temperature Statistics

September Temperature

Missoula, Missoula International Airport (34.8 miles)

  • Lowest 1 September, 2026

    45.6 °F

  • Average September

    59 °F

  • Highest 1 September, 2026

    88.6 °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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