Diablo Lake Weather Forecast

    • 49
    • 67

    Partly Sunny

    • 49
    • 69

    Partly Sunny

    • 52
    • 72

    Mostly Sunny

    • 52
    • 73

    Partly Sunny

    • 46
    • 62

    Chance Rain

    • 41
    • 56

    Slight Chance Rain

Today 5 Oct Foothills and Valleys of the North Cascades

Partly sunny. Highs in the mid 60s to lower 70s. Light wind.

Tonight 5 Oct Foothills and Valleys of the North Cascades

Partly cloudy. Areas of fog after midnight. Lows near 50. Light wind.

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Diablo Lake Temperature Statistics

October Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 1 October, 2026

    48.9 °F

  • Average October

    58.5 °F

  • Highest 2 October, 2026

    71.1 °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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