Flathead Lake - Wild Horse Island State Park Weather Forecast

    • 57
    • 75

    Increasing Clouds

    • 57
    • 77

    Mostly Cloudy

    • 57
    • 78

    Slight Chance Thunderstorms

    • 56
    • 76

    Slight Chance Thunderstorms

    • 57
    • 77

    Mostly Sunny

    • 58
    • 79

    Mostly Sunny

Today 15 Aug Flathead/Mission Valleys

Mostly sunny. Patchy fog early in the morning. Patchy smoke late in the afternoon. Highs in the mid 70s to lower 80s.

Tonight 15 Aug Flathead/Mission Valleys

Mostly cloudy in the evening then clearing. Patchy smoke in the evening. Patchy fog after midnight. Lows in the mid 40s to lower 50s.

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  • Temperature Real-Time

Flathead Lake - Wild Horse Island State Park Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (31.7 miles)

  • Lowest 5 August, 2026

    38.6 °F

  • Average August

    64 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (31.7 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45.3 °F

  • Average High 2021–2026

    56.9 °F
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