Big Sky Lake Weather Forecast

    • 49
    • 82

    Mostly Sunny

    • 47
    • 79

    Mostly Sunny

    • 46
    • 77

    Mostly Sunny

    • 48
    • 83

    Mostly Sunny

    • 51
    • 82

    Partly Sunny

    • 51
    • 83

    Partly Sunny

Today 20 Aug Potomac/Seeley Lake Region

Mostly sunny. Highs in the 80s.

Tonight 20 Aug Potomac/Seeley Lake Region

Mostly clear. Lows in the mid 40s to lower 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Sky Lake Temperature Statistics

August Temperature

Missoula, Missoula International Airport (35.4 miles)

  • Lowest 8 August, 2025

    47.6 °F

  • Average August

    68.3 °F

  • Highest 12 August, 2025

    94.6 °F

Climate (2020–Present)

Missoula, Missoula International Airport (35.4 miles)

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  • Average Low 2020–2025

    35.5 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    59.2 °F
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