Costich Lake Weather Forecast

    • 30
    • 54

    Chance Rain

    • 29
    • 50

    Partly Sunny

    • 34
    • 56

    Mostly Cloudy

    • 37
    • 49

    Rain/Snow

    • 29
    • 51

    Rain Likely

    • 25
    • 47

    Chance Snow

Today 21 Mar Kootenai/Cabinet Region

Mostly cloudy with a 50 percent chance of Areas of rain. Highs in the 50s. Southwest Winds to 15 Mph with Gusts to around 30 Mph in the afternoon.

Tonight 21 Mar Kootenai/Cabinet Region

Mostly clear. Lows in the upper 20s to mid 30s. Southwest Winds to 15 Mph with Gusts to around 30 Mph.

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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

    36.4 °F

  • Highest 19 March, 2026

    57.9 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (52.8 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    57.1 °F
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