Hamilton Weather Forecast

    • 50
    • 73

    Becoming Sunny

    • 51
    • 74

    Partly Sunny

    • 48
    • 71

    Partly Sunny

    • 47
    • 64

    Rain

    • 45
    • 58

    Rain

    • 48
    • 65

    Slight Chance Rain

Today 21 May Foothills and Valleys of the North Cascades

Mostly sunny. Highs in the 70s. Light wind.

Tonight 21 May Foothills and Valleys of the North Cascades

Mostly clear. Lows in the mid 40s to lower 50s. Light wind.

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Hamilton Temperature Statistics

May Temperature

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

  • Lowest 16 May, 2026

    42.8 °F

  • Average May

    55.7 °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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