Hat Island Weather Forecast

    • 52
    • 59

    Partly Sunny

    • 54
    • 62

    Decreasing Clouds

    • 54
    • 61

    Mostly Cloudy

    • 52
    • 60

    Mostly Cloudy

    • 51
    • 58

    Rain Likely

    • 49
    • 57

    Chance Rain

    • 49
    • 59

    Mostly Cloudy

Today 20 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny. Highs in the lower to mid 60s.

Tonight 20 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy. Patchy fog after midnight. Lows near 50. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hat Island Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (6.8 miles)

  • Lowest 16 September, 2026

    46.4 °F

  • Average September

    59.8 °F

  • Highest 9 September, 2026

    75.2 °F

Climate (2021–2026)

Burlington/Mount Vernon, Skagit Regional Airport (6.8 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    59.3 °F
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