Hamilton Weather Forecast

    • 51
    • 71

    Slight Chance Thunderstorms

    • 50
    • 74

    Chance Rain Showers

    • 52
    • 75

    Partly Sunny

    • 53
    • 71

    Mostly Cloudy

    • 54
    • 74

    Partly Sunny

    • 56
    • 80

    Mostly Sunny

    • 55
    • 77

    Chance Rain

Today 4 Sep Foothills and Valleys of the North Cascades

Partly sunny. A chance of Showers in the morning. A slight chance of Thunderstorms in the afternoon. A chance of Showers late in the afternoon. Highs in the mid 60s to lower 70s. Light wind.

Tonight 4 Sep Foothills and Valleys of the North Cascades

Mostly cloudy. A chance of Showers and a slight chance of Thunderstorms in the evening. A slight chance of rain late in the night. Lows near 50. Light wind.

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  • Temperature Real-Time

Hamilton Temperature Statistics

September Temperature

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

  • Lowest 1 September, 2026

    51.8 °F

  • Average September

    62 °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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