Hamilton Weather Forecast

    • 53
    • 73

    Increasing Clouds

    • 51
    • 74

    Mostly Cloudy

    • 50
    • 69

    Mostly Cloudy

    • 47
    • 67

    Slight Chance Rain

    • 50
    • 68

    Mostly Cloudy

    • 46
    • 63

    Chance Rain

Today 20 Sep Foothills and Valleys of the North Cascades

Sunny. Highs in the 70s. Light wind.

Tonight 20 Sep Foothills and Valleys of the North Cascades

Mostly clear. Lows near 50. Light wind.

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Hamilton Temperature Statistics

September Temperature

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

  • Lowest 16 September, 2026

    46.4 °F

  • Average September

    59.9 °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

    59.3 °F
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