Costich Lake Weather Forecast

    • 20
    • 44

    Mostly Sunny

    • 28
    • 48

    Mostly Cloudy

    • 36
    • 52

    Rain

    • 32
    • 46

    Rain/Snow

    • 31
    • 51

    Mostly Cloudy

    • 34
    • 55

    Partly Sunny

    • 34
    • 58

    Partly Sunny

Today 30 Mar Kootenai/Cabinet Region

Partly cloudy. A 50 percent chance of Areas of snow until late afternoon. Highs in the 40s. West Winds to 15 Mph in the afternoon.

Tonight 30 Mar Kootenai/Cabinet Region

Mostly clear. Lows 18 to 25.

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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

    38.4 °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

    33.4 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    57.2 °F
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