Northwest Island Weather Forecast

    • 52
    • 63

    Mostly Cloudy

    • 52
    • 65

    Chance Rain

    • 52
    • 66

    Slight Chance Rain

    • 51
    • 59

    Partly Sunny

    • 51
    • 60

    Partly Sunny

    • 52
    • 63

    Mostly Sunny

Today 11 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Cloudy in the morning then becoming partly sunny. Highs in the 60s to lower 70s. Southeast wind to 10 Mph becoming south in the afternoon.

Tonight 11 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Cloudy. Lows in the lower to mid 50s. Light wind.

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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

    57.9 °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

    56 °F
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