Mason Lake Weather Forecast

    • 34
    • 43

    Increasing Clouds

    • 41
    • 52

    Mostly Cloudy

    • 42
    • 58

    Mostly Cloudy

    • 43
    • 62

    Chance Rain

    • 39
    • 52

    Rain Likely

    • 34
    • 45

    Rain/Snow Likely

Today 17 Apr Cascades of Southern King County

Mostly sunny. Freezing level near 2500 feet increasing to 4500 feet in the afternoon. Afternoon pass Temperatures in the mid 40s. Light wind in the Passes.

Tonight 17 Apr Cascades of Southern King County

Mostly cloudy. Freezing level near 6500 feet. Light wind in the Passes.

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  • Temperature Real-Time

Mason Lake Temperature Statistics

April Temperature

Stampede Pass (13.7 miles)

  • Lowest 15 April, 2026

    25 °F

  • Average April

    38.6 °F

  • Highest 6 April, 2026

    59 °F

Climate (2021–Present)

Stampede Pass (13.7 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    41.6 °F

  • Average High 2021–2026

    48.4 °F
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