Ainsworth State Park Weather Forecast

    • 54
    • 64

    Becoming Sunny

    • 58
    • 73

    Sunny

    • 58
    • 77

    Mostly Sunny

    • 57
    • 73

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

    • 55
    • 76

    Partly Sunny

Today 15 Sep West Columbia River Gorge I-84 Corridor

Partly sunny. Highs around 70. Southwest wind 5 to 10 Mph.

Tonight 15 Sep West Columbia River Gorge I-84 Corridor

Partly cloudy in the Evening, then clearing. Lows in the mid 50s. Winds Light, rising to northeast 10 to 15 Mph after midnight.

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Ainsworth State Park Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (17.4 miles)

  • Lowest 8 September, 2026

    48.7 °F

  • Average September

    63.1 °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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