Diablo Lake Weather Forecast

    • 49
    • 62

    Chance Rain

    • 56
    • 76

    Mostly Sunny

    • 61
    • 82

    Sunny

    • 62
    • 84

    Mostly Sunny

    • 61
    • 82

    Mostly Sunny

    • 58
    • 79

    Mostly Sunny

Today 2 Aug Foothills and Valleys of the North Cascades

Mostly cloudy. A chance of Showers through the day. A slight chance of Thunderstorms early in the afternoon. Highs in the mid 60s to lower 70s. Light wind.

Tonight 2 Aug Foothills and Valleys of the North Cascades

Mostly clear. Lows in the mid 40s to lower 50s. Northwest wind to 10 Mph in the evening becoming light.

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Diablo Lake Temperature Statistics

August Temperature

Arlington Municipal Airport (60.9 miles)

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  • Average August

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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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