Big Arm Weather Forecast

    • 44
    • 58

    Chance Rain

    • 41
    • 57

    Increasing Clouds

    • 36
    • 52

    Rain Showers Likely

    • 35
    • 54

    Chance Rain/Snow

    • 37
    • 59

    Partly Sunny

    • 41
    • 62

    Slight Chance Rain

    • 43
    • 64

    Slight Chance Rain

Today 14 May Flathead/Mission Valleys

Mostly cloudy. Highs in the mid 50s to lower 60s. Southwest Winds 15 to 20 Mph with Gusts to around 35 Mph.

Tonight 14 May Flathead/Mission Valleys

Mostly cloudy with a 40 percent chance of Areas of rain. Lows in the mid 30s to lower 40s. Southwest Winds to 15 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Arm Temperature Statistics

May Temperature

Kalispell, Glacier Park International Airport (34.8 miles)

  • Lowest 6 May, 2026

    29.6 °F

  • Average May

    54.3 °F

  • Highest 12 May, 2026

    75 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (34.8 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    45.6 °F

  • Average High 2021–2026

    57.2 °F
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