Guemes Island - Boat Harbor Weather Forecast

    • 53
    • 67

    Mostly Sunny

    • 52
    • 66

    Increasing Clouds

    • 52
    • 64

    Partly Sunny

    • 52
    • 64

    Partly Sunny

    • 53
    • 66

    Chance Rain

    • 52
    • 64

    Mostly Cloudy

    • 52
    • 63

    Mostly Cloudy

Today 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny. Highs near 70.

Tonight 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows in the upper 40s to mid 50s. Light wind.

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Guemes Island - Boat Harbor Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (8.7 miles)

  • Lowest 3 September, 2026

    50 °F

  • Average September

    60 °F

  • Highest 9 September, 2026

    75.2 °F

Climate (2021–2026)

Burlington/Mount Vernon, Skagit Regional Airport (8.7 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    59.2 °F
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