Diablo Lake Weather Forecast

    • 51
    • 68

    Mostly Sunny

    • 52
    • 73

    Increasing Clouds

    • 53
    • 72

    Partly Sunny

    • 55
    • 76

    Mostly Sunny

    • 58
    • 80

    Sunny

    • 61
    • 85

    Sunny

    • 62
    • 87

    Mostly Sunny

Today 3 Jul Foothills and Valleys of the North Cascades

Mostly sunny. Highs in the upper 60s to mid 70s. Light wind becoming west around 10 Mph in the afternoon.

Tonight 3 Jul Foothills and Valleys of the North Cascades

Partly cloudy. Lows near 50. West wind to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Diablo Lake Temperature Statistics

July Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 1 July, 2025

    54 °F

  • Average July

    65.8 °F

  • Highest 1 July, 2025

    79 °F

Climate (2020–Present)

Arlington Municipal Airport (60.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    42.3 °F

  • Average 2020–2025

    50.5 °F

  • Average High 2020–2025

    59.6 °F
Get WillyWeather+ to remove ads