Columbia River - Ackerman Island Weather Forecast

    • 55
    • 81

    Sunny

    • 57
    • 86

    Mostly Sunny

    • 52
    • 77

    Partly Sunny

    • 53
    • 70

    Mostly Cloudy

    • 53
    • 69

    Rain Showers Likely

    • 53
    • 72

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

Today 8 Sep East Clark County Lowlands

Sunny. Highs in the lower 80s. Winds light.

Tonight 8 Sep East Clark County Lowlands

Clear. Lows in the mid 50s. Winds light.

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Columbia River - Ackerman Island Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (2.5 miles)

  • Lowest 5 September, 2026

    51.7 °F

  • Average September

    61.7 °F

  • Highest 5 September, 2026

    73.7 °F

Climate (2021–2026)

Portland, Portland-Troutdale Airport (2.5 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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