Olo Mountain Weather Forecast

    • 35
    • 49

    Decreasing Clouds

    • 34
    • 47

    Partly Sunny

    • 42
    • 51

    Mostly Cloudy

    • 41
    • 52

    Mostly Cloudy

    • 43
    • 51

    Rain Likely

    • 41
    • 47

    Rain

    • 41
    • 46

    Rain Likely

Today 31 Oct Cascades of Snohomish and Northern King Counties

Mostly cloudy with a chance of rain and snow. Snow level near 6000 feet. Afternoon pass Temperatures in the lower 40s.

Tonight 31 Oct Cascades of Snohomish and Northern King Counties

Mostly cloudy in the evening then becoming mostly clear. Freezing level near 6000 feet. Lows in the upper 20s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olo Mountain Temperature Statistics

October Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 12 October, 2026

    32 °F

  • Average October

    51.1 °F

  • Highest 16 October, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (13.7 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    60 °F
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