Deep Bay Weather Forecast

    • 41
    • 64

    Mostly Sunny

    • 43
    • 65

    Rain

    • 33
    • 53

    Rain

    • 32
    • 51

    Mostly Cloudy

    • 29
    • 50

    Slight Chance Snow

    • 30
    • 49

    Chance Rain

Today 21 Oct Flathead/Mission Valleys

Mostly cloudy with a slight chance of snow. Slight chance of rain in the morning. Chance of precipitation 20 percent. Highs in the mid 40s to lower 50s.

Tonight 21 Oct Flathead/Mission Valleys

Mostly clear. Lows in the 30s to lower 40s.

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Deep Bay Temperature Statistics

October Temperature

Kalispell, Glacier Park International Airport (23.6 miles)

  • Lowest 13 October, 2026

    21.7 °F

  • Average October

    46.6 °F

  • Highest 5 October, 2026

    74.6 °F

Climate (2021–2026)

Kalispell, Glacier Park International Airport (23.6 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    57 °F
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