Diablo Lake Weather Forecast

    • 49
    • 70

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

    • 56
    • 76

    Sunny

    • 59
    • 80

    Mostly Sunny

    • 59
    • 82

    Mostly Sunny

Today 17 Jun Foothills and Valleys of the North Cascades

Mostly sunny. Highs in the upper 60s to mid 70s. Northwest wind to 10 Mph.

Tonight 17 Jun Foothills and Valleys of the North Cascades

Mostly clear. Lows near 50. Northwest wind to 10 Mph in the evening becoming light.

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Diablo Lake Temperature Statistics

June Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 1 June, 2026

    39.9 °F

  • Average June

    59.5 °F

  • Highest 15 June, 2026

    86 °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

    60 °F
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