Flathead Lake Weather Forecast

    • 40
    • 49

    Gradual Clearing

    • 39
    • 50

    Increasing Clouds

    • 36
    • 50

    Rain Likely

    • 44
    • 50

    Rain

    • 40
    • 51

    Rain

    • 37
    • 46

    Chance Rain

    • 39
    • 47

    Chance Rain

Today 15 Oct Flathead/Mission Valleys

Mostly cloudy in the morning then clearing. Widespread frost in the morning. Patchy fog early in the morning. Highs in the 50s.

Tonight 15 Oct Flathead/Mission Valleys

Mostly cloudy early in the evening then clearing. Patchy fog in the late evening and overnight. Areas of frost late in the Evening, then widespread frost after midnight. Lows in the mid 20s to lower 30s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Flathead Lake Temperature Statistics

October Temperature

Kalispell, Glacier Park International Airport (30.4 miles)

  • Lowest 6 October, 2025

    26.1 °F

  • Average October

    47.6 °F

  • Highest 9 October, 2025

    73.9 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (30.4 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    45.2 °F

  • Average High 2020–2025

    56.8 °F
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