Olallie State Park Weather Forecast

    • 43
    • 60

    Becoming Sunny

    • 43
    • 61

    Rain Likely

    • 45
    • 58

    Rain

    • 39
    • 51

    Rain

    • 36
    • 46

    Rain

    • 34
    • 44

    Rain

Today 21 Oct Foothills and Valleys of Central King County

Mostly sunny. Patchy fog late in the morning. Highs in the lower to mid 60s. Light wind.

Tonight 21 Oct Foothills and Valleys of Central King County

Mostly clear. Lows in the 40s. Light wind.

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Olallie State Park Temperature Statistics

October Temperature

Stampede Pass (18.6 miles)

  • Lowest 14 October, 2025

    28 °F

  • Average October

    41.8 °F

  • Highest 6 October, 2025

    59 °F

Climate (2020–Present)

Stampede Pass (18.6 miles)

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  • Average Low 2020–2025

    36.2 °F

  • Average 2020–2025

    41.5 °F

  • Average High 2020–2025

    48.3 °F
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