Pinnacle Lake Weather Forecast

    • 32
    • 39

    Decreasing Clouds

    • 34
    • 41

    Partly Sunny

    • 33
    • 42

    Mostly Cloudy

    • 34
    • 39

    Rain

    • 33
    • 39

    Rain/Snow

    • 32
    • 36

    Snow Likely

    • 32
    • 36

    Snow Likely

Today 29 Dec Cascades of Snohomish and Northern King Counties

Partly sunny. Freezing level near 3500 feet increasing to 6500 feet in the afternoon. Afternoon pass Temperatures in the lower 30s. Light wind.

Tonight 29 Dec Cascades of Snohomish and Northern King Counties

Mostly cloudy in the evening then becoming partly cloudy. Freezing level near 8000 feet. Lows in the lower 20s. Light wind.

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Pinnacle Lake Temperature Statistics

December Temperature

Arlington Municipal Airport (19.9 miles)

  • Lowest 1 December, 2025

    30 °F

  • Average December

    45.2 °F

  • Highest 15 December, 2025

    60.1 °F

Climate (2020–Present)

Arlington Municipal Airport (19.9 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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