Ainsworth State Park Weather Forecast

    • 51
    • 58

    Rain Showers

    • 52
    • 62

    Chance Rain Showers

    • 55
    • 67

    Chance Rain Showers

    • 56
    • 69

    Chance Rain

    • 56
    • 68

    Partly Sunny

    • 58
    • 72

    Partly Sunny

Today 3 Sep West Columbia River Gorge I-84 Corridor

A slight chance of Thunderstorms. Showers. Highs in the mid 60s. Southwest wind 5 to 10 Mph. Chance of rain 90 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 3 Sep West Columbia River Gorge I-84 Corridor

Mostly cloudy. A chance of Showers, mainly in the evening. Lows in the lower 50s. Winds light. Chance of rain 50 percent. Rainfall Amounts around a tenth of an inch.

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Ainsworth State Park Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (17.4 miles)

  • Lowest 1 September, 2026

    59 °F

  • Average September

    64.7 °F

  • Highest 1 September, 2026

    71.1 °F

Climate (2021–2026)

Portland, Portland-Troutdale Airport (17.4 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    56.2 °F

  • Average High 2021–2026

    65.3 °F
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