Olallie State Park Weather Forecast

    • 39
    • 49

    Rain

    • 36
    • 53

    Slight Chance Rain/Snow

    • 38
    • 58

    Mostly Sunny

    • 38
    • 60

    Partly Sunny

    • 39
    • 61

    Slight Chance Rain

    • 41
    • 61

    Chance Rain

Today 22 Apr Foothills and Valleys of Central King County

Rain in the Morning, then cloudy with a chance of rain in the afternoon. Rainfall Amounts a half inch to one inch possible. Highs in the lower to mid 50s. Southwest wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 22 Apr Foothills and Valleys of Central King County

Mostly cloudy. A chance of rain in the Evening, then a slight chance of rain after midnight. Lows in the lower to mid 40s. South wind 10 to 15 Mph.

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Olallie State Park Temperature Statistics

April Temperature

Stampede Pass (18.6 miles)

  • Lowest 15 April, 2026

    25 °F

  • Average April

    38.1 °F

  • Highest 6 April, 2026

    59 °F

Climate (2021–Present)

Stampede Pass (18.6 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    41.5 °F

  • Average High 2021–2026

    48.3 °F
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