Costich Lake Weather Forecast

    • 59
    • 91

    Areas Smoke

    • 61
    • 93

    Patchy Smoke

    • 63
    • 98

    Hot

    • 62
    • 97

    Slight Chance Thunderstorms

    • 60
    • 95

    Mostly Sunny

    • 55
    • 90

    Mostly Sunny

Today 20 Jul Kootenai/Cabinet Region

Mostly cloudy. Areas of smoke in the morning. Highs in the upper 80s to mid 90s.

Tonight 20 Jul Kootenai/Cabinet Region

Mostly cloudy. Lows in the mid 50s to lower 60s.

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Costich Lake Temperature Statistics

July Temperature

Kalispell, Glacier Park International Airport (52.8 miles)

  • Lowest 5 July, 2026

    40.6 °F

  • Average July

    67.2 °F

  • Highest 16 July, 2026

    92.6 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (52.8 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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