Olo Mountain Weather Forecast

    • 39
    • 53

    Becoming Sunny

    • 35
    • 49

    Mostly Sunny

    • 34
    • 47

    Mostly Sunny

    • 35
    • 49

    Mostly Sunny

    • 35
    • 51

    Mostly Sunny

    • 34
    • 49

    Mostly Sunny

Today 13 Jan Cascades of Snohomish and Northern King Counties

Partly sunny. A slight chance of rain and snow in the morning. Patchy fog in the morning. Areas of fog late in the morning. Snow level near 7500 feet. No snow accumulation. Afternoon pass Temperatures in the mid 40s. Light wind.

Tonight 13 Jan Cascades of Snohomish and Northern King Counties

Mostly cloudy in the evening then becoming clear. Freezing level near 12000 feet. Lows in the lower 30s. Light wind.

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Olo Mountain Temperature Statistics

January Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 1 January, 2026

    26.6 °F

  • Average January

    42.8 °F

  • Highest 3 January, 2026

    54 °F

Climate (2021–Present)

Arlington Municipal Airport (13.7 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.8 °F
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