Island Lake Weather Forecast

    • 48
    • 62

    Increasing Clouds

    • 47
    • 56

    Mostly Cloudy

    • 53
    • 65

    Mostly Sunny

    • 54
    • 70

    Mostly Sunny

    • 49
    • 63

    Mostly Cloudy

    • 48
    • 58

    Slight Chance Rain

    • 50
    • 61

    Slight Chance Rain

Today 6 Sep Cascades of Snohomish and Northern King Counties

Partly sunny in the morning then becoming mostly sunny. Freezing level near 9500 feet. Afternoon pass Temperatures in the lower 60s. Light wind.

Tonight 6 Sep Cascades of Snohomish and Northern King Counties

Partly cloudy. A slight chance of rain in the evening. Snow level near 8000 feet. Lows in the lower 40s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Lake Temperature Statistics

September Temperature

Stampede Pass (53.4 miles)

  • Lowest 3 September, 2026

    39.9 °F

  • Average September

    47 °F

  • Highest 1 September, 2026

    61 °F

Climate (2021–2026)

Stampede Pass (53.4 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    41.5 °F

  • Average High 2021–2026

    48.2 °F
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