Diablo Lake Weather Forecast

    • 63
    • 83

    Chance Rain

    • 59
    • 80

    Rain Likely

    • 56
    • 75

    Mostly Sunny

    • 57
    • 76

    Mostly Sunny

    • 61
    • 82

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

Today 15 Jul Foothills and Valleys of the North Cascades

Sunny. Highs in the 80s. Light wind.

Tonight 15 Jul Foothills and Valleys of the North Cascades

Partly cloudy. A slight chance of rain in the morning. Lows in the mid 50s to lower 60s. Light wind.

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Diablo Lake Temperature Statistics

July Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 5 July, 2026

    46.4 °F

  • Average July

    61.5 °F

  • Highest 6 July, 2026

    81 °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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