St Mary Weather Forecast

    • 51
    • 73

    Decreasing Clouds

    • 55
    • 77

    Partly Sunny

    • 57
    • 84

    Mostly Sunny

    • 49
    • 80

    Mostly Sunny

    • 45
    • 74

    Mostly Sunny

    • 45
    • 71

    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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St Mary Temperature Statistics

August Temperature

Kalispell, Glacier Park International Airport (48.5 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 (48.5 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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