Diablo Lake Weather Forecast

    • 55
    • 80

    Increasing Clouds

    • 54
    • 67

    Chance Rain

    • 52
    • 65

    Rain Likely

    • 50
    • 62

    Chance Rain

    • 52
    • 69

    Partly Sunny

    • 53
    • 68

    Chance Rain

Today 26 Aug Foothills and Valleys of the North Cascades

Mostly sunny. Highs in the mid 70s to lower 80s. Light wind.

Tonight 26 Aug Foothills and Valleys of the North Cascades

Mostly clear in the evening then becoming mostly cloudy. Lows in the 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

    64.6 °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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