Ainsworth State Park Weather Forecast

    • 54
    • 71

    Rain

    • 48
    • 56

    Rain Showers

    • 50
    • 61

    Mostly Cloudy

    • 49
    • 63

    Partly Sunny

    • 51
    • 61

    Mostly Cloudy

    • 53
    • 61

    Chance Rain

    • 52
    • 64

    Partly Sunny

Today 24 Sep West Columbia River Gorge I-84 Corridor

Partly sunny with a 20 percent chance of rain. Highs in the mid 60s.

Tonight 24 Sep West Columbia River Gorge I-84 Corridor

A slight chance of rain this Evening, then rain after midnight. Lows in the mid 50s. Southwest wind 10 to 15 Mph. Chance of rain 90 percent. Rainfall Amounts a tenth to a quarter of an inch.

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Ainsworth State Park Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (17.4 miles)

  • Lowest 16 September, 2026

    47.6 °F

  • Average September

    63 °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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