Hope Island State Park Weather Forecast

    • 52
    • 64

    Decreasing Clouds

    • 52
    • 64

    Mostly Cloudy

    • 53
    • 65

    Partly Sunny

    • 53
    • 63

    Mostly Cloudy

    • 53
    • 62

    Mostly Cloudy

    • 53
    • 64

    Chance Rain

Today 19 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly cloudy. Highs in the mid 60s to lower 70s. Light wind.

Tonight 19 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy. Lows near 50. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hope Island State Park Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (5 miles)

  • Lowest 16 September, 2026

    46 °F

  • Average September

    57.3 °F

  • Highest 7 September, 2026

    69.1 °F

Climate (2021–2026)

Whidbey Island Naval Air Station - Ault Field (5 miles)

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  • Average Low 2021–2026

    44.4 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    55.9 °F
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