Costich Lake Weather Forecast

    • 25
    • 34

    Mostly Cloudy

    • 25
    • 39

    Decreasing Clouds

    • 32
    • 39

    Wintry Mix Likely

    • 37
    • 43

    Wintry Mix Likely

    • 35
    • 46

    Mostly Cloudy

    • 30
    • 44

    Partly Sunny

    • 23
    • 41

    Partly Sunny

Today 9 Jan Kootenai/Cabinet Region

Mostly cloudy. Slight chance of snow early in the morning. Slight chance of snow in the afternoon. Patchy fog in the morning. Chance of snow 20 percent. Highs in the 30s.

Tonight 9 Jan Kootenai/Cabinet Region

Mostly cloudy then becoming partly cloudy late in the evening then becoming mostly cloudy. Patchy fog in the late evening and overnight. Lows in the 20s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Costich Lake Temperature Statistics

January Temperature

Kalispell, Glacier Park International Airport (52.8 miles)

  • Lowest 1 January, 2026

    19.9 °F

  • Average January

    31.2 °F

  • Highest 4 January, 2026

    43 °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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