Rosario Head Weather Forecast

    • 52
    • 62

    Mostly Sunny

    • 50
    • 62

    Mostly Sunny

    • 51
    • 61

    Partly Sunny

    • 50
    • 59

    Partly Sunny

    • 51
    • 58

    Mostly Cloudy

    • 51
    • 59

    Slight Chance Rain

Today 16 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

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

Tonight 16 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Clear. Lows in the upper 40s to mid 50s. Northwest wind to 10 Mph becoming north after midnight.

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Rosario Head Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (3.7 miles)

  • Lowest 6 September, 2026

    46.9 °F

  • Average September

    57.5 °F

  • Highest 7 September, 2026

    69.1 °F

Climate (2021–2026)

Whidbey Island Naval Air Station - Ault Field (3.7 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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