Kalispell Weather Forecast

    • 56
    • 85

    Slight Chance Thunderstorms

    • 56
    • 90

    Mostly Sunny

    • 53
    • 86

    Mostly Sunny

    • 50
    • 85

    Mostly Sunny

    • 52
    • 87

    Mostly Sunny

    • 54
    • 87

    Mostly Sunny

Today 18 Aug Flathead/Mission Valleys

Mostly cloudy early in the morning then clearing. Slight chance of rain early in the afternoon. Slight chance of Showers and Thunderstorms late in the afternoon. Chance of precipitation 20 percent. Highs in the 80s.

Tonight 18 Aug Flathead/Mission Valleys

Mostly clear. Lows in the 50s.

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Kalispell Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (7.5 miles)

  • Lowest 15 August, 2025

    43.6 °F

  • Average August

    66.1 °F

  • Highest 12 August, 2025

    91.7 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (7.5 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    45 °F

  • Average High 2020–2025

    56.7 °F
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