Skagit Island Weather Forecast

    • 50
    • 65

    Becoming Sunny

    • 51
    • 66

    Mostly Sunny

    • 53
    • 66

    Rain

    • 50
    • 64

    Chance Rain

    • 51
    • 64

    Chance Rain

    • 52
    • 65

    Chance Rain

Today 18 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny until late afternoon then becoming sunny. Highs in the mid 60s to lower 70s. Light wind becoming northwest 10 to 15 Mph in the afternoon.

Tonight 18 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows near 50. Northwest wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Skagit Island Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (5.6 miles)

  • Lowest 16 September, 2025

    48 °F

  • Average September

    57.3 °F

  • Highest 16 September, 2025

    86 °F

Climate (2020–Present)

Whidbey Island Naval Air Station - Ault Field (5.6 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    50.1 °F

  • Average High 2020–2025

    56.1 °F
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