Hamilton Weather Forecast

    • 54
    • 79

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 52
    • 74

    Mostly Sunny

    • 53
    • 76

    Partly Sunny

    • 51
    • 73

    Partly Sunny

    • 51
    • 71

    Mostly Cloudy

Today 17 Sep Foothills and Valleys of the North Cascades

Sunny. Highs in the mid 70s to lower 80s. Light wind.

Tonight 17 Sep Foothills and Valleys of the North Cascades

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

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Hamilton Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (19.9 miles)

  • Lowest 3 September, 2026

    50 °F

  • Average September

    60.1 °F

  • Highest 9 September, 2026

    75.2 °F

Climate (2021–2026)

Burlington/Mount Vernon, Skagit Regional Airport (19.9 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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