Flathead Lake Weather Forecast

    • 52
    • 73

    Becoming Sunny

    • 57
    • 78

    Areas Smoke

    • 59
    • 83

    Sunny

    • 60
    • 86

    Sunny

    • 59
    • 84

    Mostly Sunny

    • 58
    • 81

    Mostly Sunny

Today 4 Aug Flathead/Mission Valleys

Mostly sunny. Patchy smoke early in the morning. Highs in the mid 70s to lower 80s.

Tonight 4 Aug Flathead/Mission Valleys

Mostly clear. Lows in the 40s.

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Flathead Lake Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (30.4 miles)

  • Lowest 2 August, 2026

    48.9 °F

  • Average August

    67.6 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (30.4 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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