Olo Mountain Weather Forecast

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    • 41

    Snow

    • 30
    • 35

    Snow

    • 31
    • 35

    Snow Showers

    • 31
    • 35

    Snow

    • 33
    • 35

    Snow

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    • 39

    Chance Snow

    • 35
    • 42

    Chance Rain/Snow

Today 4 Jan Cascades of Snohomish and Northern King Counties

Areas of dense freezing fog in the morning. Areas of fog in the morning. Rain and snow in the morning. Rain and snow likely in the afternoon. Snow level near 4000 feet. New snow accumulation up to 2 Inches. Afternoon pass Temperatures in the lower 30s. South wind in the Passes around 15 Mph becoming southwest in the afternoon. Gusts to 25 Mph.

Tonight 4 Jan Cascades of Snohomish and Northern King Counties

Rain and snow. Snow level near 3000 feet. Snow accumulation of 2 to 3 Inches. Lows in the mid 20s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olo Mountain Temperature Statistics

January Temperature

Arlington Municipal Airport (13.7 miles)

  • Lowest 1 January, 2026

    26.6 °F

  • Average January

    38.4 °F

  • Highest 2 January, 2026

    48.9 °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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