Diablo Lake Weather Forecast

    • 39
    • 47

    Rain Showers Likely

    • 42
    • 58

    Mostly Cloudy

    • 42
    • 60

    Partly Sunny

    • 42
    • 59

    Partly Sunny

    • 45
    • 65

    Partly Sunny

    • 45
    • 65

    Partly Sunny

Today 16 May Foothills and Valleys of the North Cascades

Rain Showers likely in the Morning, then mostly cloudy with a chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Rainfall Amounts a half inch to one inch Possible, except higher Amounts possible in Thunderstorms. Highs in the 50s. South wind 10 to 15 Mph becoming west in the afternoon.

Tonight 16 May Foothills and Valleys of the North Cascades

Mostly cloudy with a chance of rain Showers. Lows in the lower to mid 40s. West wind 10 to 15 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Diablo Lake Temperature Statistics

May Temperature

Arlington Municipal Airport (60.9 miles)

  • Lowest 12 May, 2026

    44.6 °F

  • Average May

    58.2 °F

  • Highest 12 May, 2026

    84 °F

Climate (2021–Present)

Arlington Municipal Airport (60.9 miles)

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

  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
Get WillyWeather+ to remove ads