Big Arm Weather Forecast

    • 56
    • 81

    Slight Chance Rain

    • 50
    • 74

    Chance Rain

    • 47
    • 65

    Chance Rain

    • 53
    • 74

    Mostly Sunny

    • 53
    • 78

    Partly Sunny

    • 50
    • 70

    Chance Rain

Today 28 Aug Flathead/Mission Valleys

Mostly sunny. Patchy smoke in the late morning and afternoon. Highs in the upper 70s to mid 80s. Southwest Winds to 15 Mph.

Tonight 28 Aug Flathead/Mission Valleys

Partly cloudy. Patchy smoke through the night. A 20 percent chance of rain after midnight. Lows in the mid 40s to lower 50s. West Winds to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Arm Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (34.8 miles)

  • Lowest 5 August, 2026

    38.6 °F

  • Average August

    64.9 °F

  • Highest 1 August, 2026

    93.7 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (34.8 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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