Olo Mountain Weather Forecast

    • 49
    • 64

    Areas Smoke

    • 50
    • 68

    Areas Smoke

    • 50
    • 66

    Rain Likely

    • 46
    • 57

    Chance Rain

    • 51
    • 63

    Partly Sunny

    • 52
    • 67

    Chance Rain

Today 18 Sep Cascades of Snohomish and Northern King Counties

Mostly cloudy in the morning then becoming mostly sunny. Areas of smoke. Freezing level near 12500 feet. Afternoon pass Temperatures in the mid 60s. Light wind.

Tonight 18 Sep Cascades of Snohomish and Northern King Counties

Mostly clear. Areas of smoke after midnight. Freezing level near 13500 feet. Lows in the upper 40s. Light wind.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Olo Mountain Temperature Statistics

September Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 16 September, 2025

    46.4 °F

  • Average September

    63.1 °F

  • Highest 16 September, 2025

    90 °F

Climate (2020–Present)

Arlington Municipal Airport (13.7 miles)

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

  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    50.6 °F

  • Average High 2020–2025

    59.7 °F
Get WillyWeather+ to remove ads