Hamilton Weather Forecast

    • 51
    • 73

    Increasing Clouds

    • 53
    • 70

    Mostly Cloudy

    • 52
    • 73

    Chance Rain

    • 52
    • 68

    Slight Chance Rain

    • 52
    • 71

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 56
    • 81

    Sunny

Today 10 Sep Foothills and Valleys of the North Cascades

Partly sunny. Highs in the upper 60s to mid 70s. Light wind.

Tonight 10 Sep Foothills and Valleys of the North Cascades

Partly cloudy then becoming mostly cloudy late in the evening then becoming partly cloudy. Lows in the lower 50s. Northwest wind to 10 Mph in the evening becoming light.

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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

    60.8 °F

  • Highest 1 September, 2026

    71.6 °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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