Diablo Lake Weather Forecast

    • 50
    • 56

    Rain Showers

    • 51
    • 61

    Mostly Cloudy

    • 55
    • 75

    Partly Sunny

    • 53
    • 70

    Chance Rain

    • 52
    • 60

    Rain Likely

    • 50
    • 61

    Rain Likely

Today 29 Aug Foothills and Valleys of the North Cascades

Showers and a slight chance of Thunderstorms in the Morning, then mostly cloudy with a chance of Showers and a slight chance of Thunderstorms in the afternoon. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. Highs in the mid 60s to lower 70s. Light wind.

Tonight 29 Aug Foothills and Valleys of the North Cascades

Partly cloudy with a slight chance of Showers in the Evening, then mostly cloudy in the late evening and early morning. Mostly cloudy with a slight chance of Showers in the morning. Lows near 50. South wind to 10 Mph with Gusts to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Diablo Lake Temperature Statistics

August Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 3 August, 2026

    46.4 °F

  • Average August

    64.7 °F

  • Highest 25 August, 2026

    89.1 °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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