Grinnell Lake Weather Forecast

    • 48
    • 66

    Decreasing Clouds

    • 52
    • 70

    Mostly Sunny

    • 54
    • 76

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 44
    • 67

    Mostly Sunny

    • 44
    • 65

    Mostly Sunny

Today 17 Aug East Glacier Park Region

Mostly cloudy. Highs 60 to 70. Southwest Winds 5 to 15 Mph.

Tonight 17 Aug East Glacier Park Region

Mostly clear. Lows around 50. Southwest Winds 5 to 15 Mph.

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  • Temperature Real-Time

Grinnell Lake Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (40.4 miles)

  • Lowest 6 August, 2025

    46.7 °F

  • Average August

    66.7 °F

  • Highest 12 August, 2025

    91.7 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (40.4 miles)

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  • Average Low 2020–2025

    33 °F

  • Average 2020–2025

    45.1 °F

  • Average High 2020–2025

    56.8 °F
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