Northwest Island Weather Forecast

    • 51
    • 63

    Increasing Clouds

    • 49
    • 63

    Partly Sunny

    • 50
    • 66

    Mostly Sunny

    • 51
    • 66

    Mostly Sunny

    • 52
    • 61

    Partly Sunny

    • 51
    • 60

    Partly Sunny

Today 14 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Cloudy until late afternoon then becoming partly sunny. Areas of drizzle in the morning. Highs in the 60s. South wind to 10 Mph.

Tonight 14 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 40s to mid 50s. Light wind becoming north to 10 Mph after midnight.

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Northwest Island Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (4.3 miles)

  • Lowest 6 September, 2026

    46.9 °F

  • Average September

    57.4 °F

  • Highest 7 September, 2026

    69.1 °F

Climate (2021–2026)

Whidbey Island Naval Air Station - Ault Field (4.3 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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