Boulder Lake Weather Forecast

    • 40
    • 46

    Rain Showers

    • 41
    • 48

    Mostly Cloudy

    • 47
    • 60

    Partly Sunny

    • 45
    • 56

    Chance Rain

    • 43
    • 49

    Rain

    • 42
    • 48

    Rain Showers Likely

Today 29 Aug Cascades of Whatcom and Skagit Counties

Showers, a slight chance of Thunderstorms and Showers. Snow level near 7000 feet. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. No snow accumulation.

Tonight 29 Aug Cascades of Whatcom and Skagit Counties

Mostly cloudy. A chance of Showers in the Evening, then a slight chance of Showers after midnight. Snow level near 7000 feet.

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Boulder Lake Temperature Statistics

August Temperature

Arlington Municipal Airport (39.8 miles)

  • Lowest 3 August, 2026

    46.4 °F

  • Average August

    64.7 °F

  • Highest 25 August, 2026

    89.1 °F

Climate (2021–2026)

Arlington Municipal Airport (39.8 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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