Ainsworth State Park Weather Forecast

    • 55
    • 64

    Rain Likely

    • 53
    • 65

    Partly Sunny

    • 60
    • 75

    Sunny

    • 61
    • 80

    Mostly Sunny

    • 56
    • 74

    Mostly Sunny

    • 55
    • 65

    Slight Chance Rain

Today 6 Sep West Columbia River Gorge I-84 Corridor

Rain late this Morning, then Showers likely this afternoon. Highs in the upper 60s. Winds light. Chance of rain 80 percent. Rainfall Amounts around a tenth of an inch.

Tonight 6 Sep West Columbia River Gorge I-84 Corridor

Mostly cloudy. A chance of Showers in the evening. Lows in the mid 50s. Southwest wind 5 to 10 Mph. Chance of rain 40 percent. Rainfall Amounts less than a tenth of an inch.

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Ainsworth State Park Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (17.4 miles)

  • Lowest 4 September, 2026

    53.1 °F

  • Average September

    61.2 °F

  • Highest 1 September, 2026

    71.7 °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

    65.2 °F
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