Boulder Creek Weather Forecast

    • 21
    • 30

    Decreasing Clouds

    • 28
    • 36

    Increasing Clouds

    • 32
    • 43

    Mostly Cloudy

    • 34
    • 43

    Mostly Cloudy

    • 34
    • 44

    Chance Rain

    • 32
    • 41

    Rain/Snow

    • 29
    • 37

    Rain/Snow

Today 27 Dec Cascades of Snohomish and Northern King Counties

Mostly sunny. A chance of snow in the Morning, then a slight chance of snow late in the morning. Patchy dense fog in the morning. Afternoon pass Temperatures in the lower 20s. West wind in the Passes around 10 Mph with Gusts to 25 Mph in the morning becoming light.

Tonight 27 Dec Cascades of Snohomish and Northern King Counties

Mostly cloudy. Freezing level near 500 feet. Lows around 14. Light wind.

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Boulder Creek Temperature Statistics

December Temperature

Arlington Municipal Airport (31.7 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 (31.7 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.8 °F
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