Big Arm Weather Forecast

    • 31
    • 47

    Rain/Snow Likely

    • 30
    • 45

    Mostly Cloudy

    • 31
    • 48

    Partly Sunny

    • 32
    • 49

    Mostly Cloudy

    • 37
    • 52

    Slight Chance Rain

    • 41
    • 56

    Chance Rain

    • 40
    • 61

    Mostly Sunny

Today 23 Apr Flathead/Mission Valleys

Slight chance of Thunderstorms. Chance of Thunderstorms 90 percent. Snow level 3000 feet. Little or no new snow accumulation. Highs in the 40s to lower 50s. Northwest Winds to 15 Mph.

Tonight 23 Apr Flathead/Mission Valleys

Mostly cloudy until early morning then becoming partly cloudy. Areas of rain and snow early in the Evening, then Areas of snow in the late evening and early morning. Chance of precipitation 50 percent. Lows in the 20s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Arm Temperature Statistics

April Temperature

Kalispell, Glacier Park International Airport (34.8 miles)

  • Lowest 8 April, 2026

    20.6 °F

  • Average April

    43.3 °F

  • Highest 6 April, 2026

    67.6 °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

    45.5 °F

  • Average High 2021–2026

    57.1 °F
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