Diablo Lake Weather Forecast

    • 48
    • 68

    Partly Sunny

    • 49
    • 64

    Rain Likely

    • 43
    • 57

    Rain Likely

    • 43
    • 57

    Partly Sunny

    • 48
    • 68

    Slight Chance Rain

Today 23 May Foothills and Valleys of the North Cascades

Partly sunny. Highs in the upper 60s to mid 70s. South wind 10 to 15 Mph becoming southwest in the afternoon. Gusts to 25 Mph.

Tonight 23 May Foothills and Valleys of the North Cascades

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid to upper 40s. South wind 10 to 15 Mph decreasing to 10 Mph or less after midnight. Gusts to 30 Mph.

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  • Temperature Real-Time

Diablo Lake Temperature Statistics

May Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 18 May, 2026

    42.1 °F

  • Average May

    56.5 °F

  • Highest 12 May, 2026

    84 °F

Climate (2021–Present)

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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