Flathead Lake Weather Forecast

    • 57
    • 78

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

    • 58
    • 78

    Partly Sunny

    • 58
    • 76

    Mostly Cloudy

    • 57
    • 74

    Chance Rain

    • 56
    • 73

    Chance Rain Showers

Today 17 Jul Flathead/Mission Valleys

Mostly sunny. A 20 percent chance of Showers and Thunderstorms in the afternoon. Highs in the 80s. Southwest Winds to 15 Mph in the afternoon.

Tonight 17 Jul Flathead/Mission Valleys

Mostly clear. Lows in the upper 40s to mid 50s. North Winds to 15 Mph.

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Flathead Lake Temperature Statistics

July Temperature

Kalispell, Glacier Park International Airport (30.4 miles)

  • Lowest 4 July, 2025

    42.7 °F

  • Average July

    68.4 °F

  • Highest 8 July, 2025

    92.6 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (30.4 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    45.1 °F

  • Average High 2020–2025

    56.8 °F
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