Rosario Head Weather Forecast

    • 37
    • 46

    Mostly Cloudy

    • 37
    • 43

    Mostly Cloudy

    • 35
    • 45

    Mostly Sunny

    • 35
    • 44

    Partly Sunny

    • 39
    • 44

    Chance Rain

    • 42
    • 47

    Slight Chance Rain

Today 21 Jan Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly sunny. Highs in the 40s to lower 50s. Light wind.

Tonight 21 Jan Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy in the evening then becoming mostly cloudy. Lows in the 30s. Light wind.

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Rosario Head Temperature Statistics

January Temperature

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

  • Lowest 18 January, 2026

    28.9 °F

  • Average January

    44 °F

  • Highest 13 January, 2026

    55 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    56.1 °F
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