Hamilton Weather Forecast

    • 49
    • 64

    Chance Rain Showers

    • 49
    • 67

    Mostly Cloudy

    • 53
    • 77

    Mostly Cloudy

    • 53
    • 73

    Rain Likely

    • 52
    • 66

    Rain

    • 50
    • 68

    Rain Likely

    • 51
    • 70

    Chance Rain

Today 29 Aug Foothills and Valleys of the North Cascades

Showers and a slight chance of Thunderstorms in the Morning, then mostly cloudy with a chance of Showers and a slight chance of Thunderstorms in the afternoon. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. Highs in the mid 60s to lower 70s. Light wind.

Tonight 29 Aug Foothills and Valleys of the North Cascades

Partly cloudy with a slight chance of rain in the Evening, then mostly cloudy after midnight. Patchy fog late in the night. Lows near 50. South wind to 10 Mph with Gusts to 20 Mph.

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Hamilton Temperature Statistics

August Temperature

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

  • Lowest 3 August, 2026

    50 °F

  • Average August

    62.9 °F

  • Highest 25 August, 2026

    86 °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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