Lake Shannon Weather Forecast

    • 58
    • 74

    Mostly Cloudy

    • 56
    • 72

    Mostly Cloudy

    • 53
    • 74

    Partly Sunny

    • 58
    • 80

    Mostly Sunny

    • 62
    • 88

    Mostly Sunny

    • 62
    • 87

    Mostly Sunny

Today 18 Aug Foothills and Valleys of the North Cascades

Mostly cloudy in the morning then becoming mostly sunny. Highs in the 70s. Light wind.

Tonight 18 Aug Foothills and Valleys of the North Cascades

Mostly cloudy. Lows in the mid to upper 50s. Light wind.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Shannon Temperature Statistics

August Temperature

Burlington/Mount Vernon, Skagit Regional Airport (32.9 miles)

  • Lowest 8 August, 2025

    50 °F

  • Average August

    64.8 °F

  • Highest 12 August, 2025

    87.8 °F

Climate (2020–Present)

Burlington/Mount Vernon, Skagit Regional Airport (32.9 miles)

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

  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    59.7 °F
Get WillyWeather+ to remove ads