Big Arm Weather Forecast

    • 55
    • 72

    Chance Rain Showers

    • 55
    • 70

    Chance Rain Showers

    • 57
    • 77

    Partly Sunny

    • 59
    • 80

    Mostly Cloudy

    • 58
    • 79

    Slight Chance Thunderstorms

    • 57
    • 79

    Slight Chance Rain

Today 13 Aug Flathead/Mission Valleys

Rain Showers likely and a slight chance of Thunderstorms early in the Morning, then Areas of rain late in the morning. Chance of Showers and Thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the upper 60s to mid 70s. North Winds to 15 Mph in the afternoon.

Tonight 13 Aug Flathead/Mission Valleys

Partly cloudy. Lows in the 40s to lower 50s. North Winds to 15 Mph.

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  • 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

    63.5 °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

    45.3 °F

  • Average High 2021–2026

    57 °F
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