Costich Lake Weather Forecast

    • 8
    • 20

    Partly Sunny

    • 9
    • 23

    Decreasing Clouds

    • 11
    • 26

    Mostly Sunny

    • 16
    • 28

    Mostly Cloudy

    • 20
    • 32

    Partly Sunny

    • 24
    • 34

    Mostly Cloudy

    • 26
    • 36

    Mostly Cloudy

Today 23 Jan Kootenai/Cabinet Region

Mostly sunny. Highs 18 to 25.

Tonight 23 Jan Kootenai/Cabinet Region

Mostly clear. Lows 6 to 13.

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Costich Lake Temperature Statistics

January Temperature

Kalispell, Glacier Park International Airport (52.8 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 (52.8 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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