Diablo Lake Weather Forecast

    • 54
    • 65

    Chance Rain Showers

    • 60
    • 81

    Areas Smoke

    • 61
    • 87

    Mostly Sunny

    • 56
    • 75

    Partly Sunny

    • 52
    • 68

    Partly Sunny

    • 52
    • 69

    Mostly Sunny

Today 23 Aug Foothills and Valleys of the North Cascades

Mostly cloudy with a chance of Showers and a slight chance of Thunderstorms in the Morning, then mostly cloudy with a chance of Showers early in the afternoon. Partly sunny late in the afternoon. Highs in the 70s. South wind around 10 Mph. Gusts to 20 Mph in the morning.

Tonight 23 Aug Foothills and Valleys of the North Cascades

Mostly clear. Lows in the lower 50s. Northwest wind around 10 Mph becoming north after midnight.

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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

    64.7 °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

    42.5 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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