Hamilton Weather Forecast

    • 45
    • 64

    Increasing Clouds

    • 46
    • 64

    Mostly Cloudy

    • 49
    • 69

    Partly Sunny

    • 50
    • 71

    Partly Sunny

    • 50
    • 70

    Partly Sunny

    • 48
    • 68

    Partly Sunny

Today 18 May Foothills and Valleys of the North Cascades

Mostly cloudy in the morning then becoming mostly sunny. Highs in the 60s. South wind to 10 Mph becoming west around 10 Mph in the Afternoon, Gusts to 20 Mph in the morning.

Tonight 18 May Foothills and Valleys of the North Cascades

Partly cloudy. Lows in the 40s. West wind to 10 Mph in the evening becoming light.

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Hamilton Temperature Statistics

May Temperature

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

  • Lowest 11 May, 2026

    44.6 °F

  • Average May

    56.4 °F

  • Highest 4 May, 2026

    78.8 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    59.6 °F
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