Northwest Island Weather Forecast

    • 50
    • 67

    Mostly Sunny

    • 50
    • 65

    Partly Sunny

    • 50
    • 63

    Partly Sunny

    • 51
    • 63

    Partly Sunny

    • 52
    • 61

    Mostly Cloudy

    • 51
    • 59

    Slight Chance Rain

Today 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Sunny. Highs in the upper 60s to mid 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows in the upper 40s to mid 50s. North wind to 10 Mph becoming east 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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