Marten Lake Weather Forecast

    • 40
    • 49

    Gradual Clearing

    • 44
    • 58

    Mostly Sunny

    • 44
    • 61

    Mostly Sunny

    • 36
    • 49

    Chance Rain Showers

    • 34
    • 40

    Chance Rain Showers

    • 37
    • 43

    Slight Chance Rain/Snow

    • 37
    • 45

    Mostly Cloudy

Today 19 Oct Cascades of Southern King County

Mostly sunny. Freezing level near 8500 feet.

Tonight 19 Oct Cascades of Southern King County

Mostly cloudy until early morning then becoming partly cloudy. Patchy fog late in the night. Freezing level near 9000 feet. Light wind in the Passes.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marten Lake Temperature Statistics

October Temperature

Stampede Pass (23 miles)

  • Lowest 10 October, 2026

    33.1 °F

  • Average October

    47.8 °F

  • Highest 4 October, 2026

    70 °F

Climate (2021–2026)

Stampede Pass (23 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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