Costich Lake Weather Forecast

    • 32
    • 54

    Mostly Cloudy

    • 35
    • 58

    Mostly Cloudy

    • 32
    • 51

    Rain/Snow

    • 22
    • 44

    Snow Likely

    • 30
    • 47

    Mostly Cloudy

    • 34
    • 51

    Rain/Snow Likely

    • 30
    • 46

    Rain Likely

Today 27 Mar Kootenai/Cabinet Region

Partly cloudy. Highs in the 50s.

Tonight 27 Mar Kootenai/Cabinet Region

Mostly cloudy. Lows in the 30s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Costich Lake Temperature Statistics

March Temperature

Kalispell, Glacier Park International Airport (52.8 miles)

  • Lowest 15 March, 2026

    5.6 °F

  • Average March

    38.7 °F

  • Highest 20 March, 2026

    68.6 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (52.8 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    57.2 °F
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