Upper Isabel Lake Weather Forecast

    • 35
    • 48

    Mostly Cloudy

    • 39
    • 53

    Mostly Sunny

    • 39
    • 61

    Rain Likely

    • 25
    • 47

    Rain/Snow

    • 21
    • 33

    Snow Likely

    • 19
    • 30

    Chance Snow

    • 18
    • 32

    Chance Snow

Today 19 Apr West Glacier Region

Mostly sunny. Highs in the mid 50s to lower 60s.

Tonight 19 Apr West Glacier Region

Mostly cloudy. Lows in the mid 30s to lower 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Isabel Lake Temperature Statistics

April Temperature

Kalispell, Glacier Park International Airport (35.4 miles)

  • Lowest 8 April, 2026

    20.6 °F

  • Average April

    43.4 °F

  • Highest 6 April, 2026

    67.6 °F

Climate (2021–Present)

Kalispell, Glacier Park International Airport (35.4 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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