Mason Lake Weather Forecast

    • 49
    • 65

    Becoming Sunny

    • 50
    • 66

    Partly Sunny

    • 52
    • 69

    Mostly Sunny

    • 59
    • 77

    Partly Sunny

    • 58
    • 77

    Partly Sunny

    • 57
    • 75

    Mostly Sunny

Today 17 Jul Cascades of Southern King County

Mostly cloudy in the morning then becoming sunny. Patchy dense fog in the morning. Freezing level near 14000 feet. Afternoon pass Temperatures in the lower 70s. Light wind in the Passes becoming west around 10 Mph in the afternoon.

Tonight 17 Jul Cascades of Southern King County

Mostly clear in the evening then becoming mostly cloudy. Freezing level near 14000 feet. Northwest wind in the Passes around 10 Mph in the evening becoming light.

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Mason Lake Temperature Statistics

July Temperature

Stampede Pass (13.7 miles)

  • Lowest 1 July, 2026

    39 °F

  • Average July

    55.9 °F

  • Highest 15 July, 2026

    81 °F

Climate (2021–2026)

Stampede Pass (13.7 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    41.6 °F

  • Average High 2021–2026

    48.3 °F
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