Sourdough Lake Weather Forecast

    • 47
    • 62

    Areas Smoke

    • 46
    • 66

    Mostly Sunny

    • 45
    • 60

    Rain Likely

    • 42
    • 50

    Chance Rain

    • 46
    • 57

    Partly Sunny

    • 49
    • 61

    Chance Rain

Today 18 Sep Cascades of Whatcom and Skagit Counties

Mostly sunny. Areas of smoke. Freezing level near 12000 feet.

Tonight 18 Sep Cascades of Whatcom and Skagit Counties

Mostly clear. Areas of smoke. Freezing level near 13500 feet.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sourdough Lake Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (62.1 miles)

  • Lowest 1 September, 2025

    51.8 °F

  • Average September

    61 °F

  • Highest 3 September, 2025

    78.8 °F

Climate (2020–Present)

Burlington/Mount Vernon, Skagit Regional Airport (62.1 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