Northwest Island Weather Forecast

    • 47
    • 58

    Mostly Cloudy

    • 47
    • 59

    Partly Sunny

    • 51
    • 60

    Rain

    • 51
    • 60

    Rain Likely

    • 49
    • 56

    Mostly Cloudy

    • 49
    • 55

    Slight Chance Rain

    • 48
    • 55

    Partly Sunny

Today 26 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny. Highs in the upper 50s to mid 60s. South wind to 10 Mph becoming west in the afternoon.

Tonight 26 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy in the evening then becoming mostly cloudy. Lows in the 40s. North wind to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Northwest Island Temperature Statistics

September Temperature

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

  • Lowest 18 September, 2026

    45 °F

  • Average September

    56.6 °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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