Boy Lake Weather Forecast

    • 45
    • 62

    Mostly Sunny

    • 46
    • 62

    Mostly Sunny

    • 43
    • 61

    Partly Sunny

    • 47
    • 59

    Partly Sunny

    • 38
    • 50

    Partly Sunny

    • 42
    • 51

    Mostly Sunny

    • 45
    • 60

    Partly Sunny

Today 17 Sep East Glacier Park Region

Sunny. Highs 65 to 75. South Winds up to 10 Mph.

Tonight 17 Sep East Glacier Park Region

Mostly clear. Lows 45 to 50. South Winds up to 10 Mph.

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Boy Lake Temperature Statistics

September Temperature

Kalispell, Glacier Park International Airport (39.8 miles)

  • Lowest 9 September, 2025

    44.1 °F

  • Average September

    66.5 °F

  • Highest 2 September, 2025

    93.2 °F

Climate (2020–Present)

Kalispell, Glacier Park International Airport (39.8 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    45.2 °F

  • Average High 2020–2025

    56.8 °F
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