Diablo Lake Weather Forecast

    • 57
    • 74

    Mostly Sunny

    • 58
    • 74

    Chance Thunderstorms

    • 58
    • 75

    Chance Rain Showers

    • 58
    • 75

    Chance Rain Showers

    • 59
    • 77

    Partly Sunny

    • 59
    • 77

    Partly Sunny

Today 11 Aug Foothills and Valleys of the North Cascades

Sunny. Highs in the 70s. Light wind.

Tonight 11 Aug Foothills and Valleys of the North Cascades

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

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Diablo Lake Temperature Statistics

August Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 3 August, 2026

    46.4 °F

  • Average August

    64.4 °F

  • Highest 6 August, 2026

    84.9 °F

Climate (2021–2026)

Arlington Municipal Airport (60.9 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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