Olo Mountain Weather Forecast

    • 30
    • 34

    Increasing Clouds

    • 33
    • 41

    Mostly Cloudy

    • 32
    • 44

    Mostly Cloudy

    • 35
    • 42

    Chance Rain

    • 35
    • 42

    Snow

    • 32
    • 38

    Snow

Today 28 Dec Cascades of Snohomish and Northern King Counties

Partly sunny. Freezing level near 500 feet increasing to 1500 feet in the afternoon. Afternoon pass Temperatures in the upper 20s. Light wind.

Tonight 28 Dec Cascades of Snohomish and Northern King Counties

Mostly cloudy. Freezing level near 2000 feet increasing to 3000 feet after midnight. Lows in the lower 20s. Light wind.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Olo Mountain Temperature Statistics

December Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 1 December, 2025

    30 °F

  • Average December

    45.8 °F

  • Highest 15 December, 2025

    60.1 °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

    42.5 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.8 °F
Get WillyWeather+ to remove ads