Big Arm State Park Weather Forecast

    • 47
    • 66

    Patchy Smoke

    • 53
    • 75

    Mostly Sunny

    • 57
    • 82

    Chance Rain Showers

    • 50
    • 70

    Rain Showers Likely

    • 48
    • 66

    Chance Rain Showers

    • 49
    • 70

    Partly Sunny

Today 30 Aug Flathead/Mission Valleys

Mostly cloudy. A 50 percent chance of rain Showers until late afternoon. Patchy smoke in the morning. Highs in the mid 60s to lower 70s. Southwest Winds 15 to 25 Mph.

Tonight 30 Aug Flathead/Mission Valleys

Mostly clear. Patchy smoke after midnight. Patchy fog late in the night. Lows in the mid 30s to lower 40s. Southwest Winds to 15 Mph in the evening.

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Big Arm State Park Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (33.6 miles)

  • Lowest 5 August, 2026

    38.6 °F

  • Average August

    65.3 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (33.6 miles)

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  • Average Low 2021–2026

    33.3 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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