Costich Lake Weather Forecast

    • 47
    • 83

    Increasing Clouds

    • 37
    • 62

    Rain Showers

    • 30
    • 52

    Rain/Snow Likely

    • 28
    • 52

    Slight Chance Snow

    • 30
    • 55

    Partly Sunny

    • 35
    • 58

    Partly Sunny

Today 21 Apr Kootenai/Cabinet Region

Mostly sunny. Highs in the upper 70s to mid 80s.

Tonight 21 Apr Kootenai/Cabinet Region

Mostly cloudy. A 20 percent chance of rain after midnight. Lows in the 40s to lower 50s.

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  • Temperature Real-Time

Costich Lake Temperature Statistics

April Temperature

Kalispell, Glacier Park International Airport (52.8 miles)

  • Lowest 8 April, 2026

    20.6 °F

  • Average April

    43.1 °F

  • Highest 6 April, 2026

    67.6 °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

    57.1 °F
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