Flathead Lake State Park - Yellow Bay Unit Weather Forecast

    • 16
    • 25

    Increasing Clouds

    • 17
    • 25

    Decreasing Clouds

    • 19
    • 28

    Partly Sunny

    • 26
    • 32

    Mostly Cloudy

    • 27
    • 36

    Mostly Cloudy

    • 30
    • 39

    Mostly Cloudy

    • 32
    • 39

    Mostly Cloudy

Today 23 Jan Flathead/Mission Valleys

Mostly sunny. Highs 18 to 25.

Tonight 23 Jan Flathead/Mission Valleys

Partly cloudy until early morning then becoming mostly cloudy. Lows 4 to 11.

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Flathead Lake State Park - Yellow Bay Unit Temperature Statistics

January Temperature

Kalispell, Glacier Park International Airport (31.1 miles)

  • Lowest 17 January, 2026

    14 °F

  • Average January

    28.8 °F

  • Highest 12 January, 2026

    45 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (31.1 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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