Flathead Lake Weather Forecast

    • 46
    • 52

    Chance Rain

    • 47
    • 55

    Chance Rain

    • 48
    • 58

    Chance Rain

    • 46
    • 62

    Chance Rain

    • 36
    • 55

    Chance Rain

    • 36
    • 50

    Mostly Cloudy

Today 17 Mar Flathead/Mission Valleys

Mostly cloudy with a 50 percent chance of Areas of rain. Highs in the upper 40s to mid 50s.

Tonight 17 Mar Flathead/Mission Valleys

Mostly cloudy with a 50 percent chance of rain. Lows in the mid 30s to lower 40s.

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Flathead Lake Temperature Statistics

March Temperature

Kalispell, Glacier Park International Airport (30.4 miles)

  • Lowest 15 March, 2026

    12.9 °F

  • Average March

    35.5 °F

  • Highest 3 March, 2026

    56.6 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (30.4 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    57.1 °F
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