Jack Island Weather Forecast

    • 52
    • 62

    Decreasing Clouds

    • 53
    • 61

    Increasing Clouds

    • 51
    • 62

    Slight Chance Rain

    • 52
    • 64

    Partly Sunny

    • 53
    • 65

    Partly Sunny

    • 52
    • 64

    Partly Sunny

    • 53
    • 66

    Partly Sunny

Today 3 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly sunny. A slight chance of Showers in the afternoon. Highs in the 60s. Southeast wind 10 to 20 Mph becoming south 10 to 15 Mph in the afternoon.

Tonight 3 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy. Lows in the mid 40s to lower 50s. Light wind.

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Jack Island Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (11.2 miles)

  • Lowest 1 September, 2026

    51.8 °F

  • Average September

    61.2 °F

  • Highest 1 September, 2026

    71.6 °F

Climate (2021–2026)

Burlington/Mount Vernon, Skagit Regional Airport (11.2 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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