Marten Lake Weather Forecast

    • 43
    • 53

    Chance Rain

    • 44
    • 56

    Chance Rain

    • 47
    • 60

    Slight Chance Rain

    • 48
    • 54

    Slight Chance Rain

    • 49
    • 59

    Mostly Cloudy

    • 52
    • 66

    Partly Sunny

Today 4 Sep Cascades of Southern King County

Partly sunny. A slight chance of rain in the Morning, then Showers likely and a slight chance of Thunderstorms in the afternoon. Snow level near 7000 feet. Rainfall Amounts a tenth to a quarter of an inch Possible, except higher Amounts possible in Thunderstorms. Afternoon pass Temperatures in the upper 50s. Light wind in the Passes.

Tonight 4 Sep Cascades of Southern King County

Mostly cloudy with a chance of rain in the Evening, then mostly cloudy after midnight. Snow level near 7000 feet. Light wind in the Passes.

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Marten Lake Temperature Statistics

September Temperature

Stampede Pass (23 miles)

  • Lowest 1 September, 2026

    48 °F

  • Average September

    53.3 °F

  • Highest 1 September, 2026

    61 °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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