Ainsworth State Park Weather Forecast

    • 52
    • 65

    Increasing Clouds

    • 54
    • 62

    Rain

    • 54
    • 68

    Partly Sunny

    • 55
    • 70

    Partly Sunny

    • 54
    • 67

    Partly Sunny

    • 56
    • 70

    Mostly Sunny

Today 28 Sep West Columbia River Gorge I-84 Corridor

Sunny. Highs in the lower 70s. Southwest wind 10 to 15 Mph.

Tonight 28 Sep West Columbia River Gorge I-84 Corridor

Partly cloudy. Lows in the lower 50s. Southwest wind 5 to 10 Mph.

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Ainsworth State Park Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (17.4 miles)

  • Lowest 24 September, 2026

    45.6 °F

  • Average September

    62.7 °F

  • Highest 9 September, 2026

    88.6 °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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