Columbia River - Ackerman Island Weather Forecast

    • 47
    • 70

    Chance Rain Showers

    • 56
    • 76

    Mostly Sunny

    • 56
    • 88

    Sunny

    • 51
    • 77

    Partly Sunny

    • 50
    • 73

    Partly Sunny

    • 53
    • 77

    Mostly Sunny

Today 14 Sep East Clark County Lowlands

Cloudy this Morning, then becoming partly sunny. A slight chance of Thunderstorms. Showers, mainly this morning. Highs around 70. Southwest wind 5 to 10 Mph, becoming west this afternoon. Chance of rain 90 percent. Rainfall Amounts a tenth to a quarter of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 14 Sep East Clark County Lowlands

Mostly clear. Lows in the mid 40s. Northwest wind 5 to 10 Mph, becoming light after midnight.

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Columbia River - Ackerman Island Temperature Statistics

September Temperature

Portland, Portland-Troutdale Airport (2.5 miles)

  • Lowest 8 September, 2025

    54 °F

  • Average September

    68.2 °F

  • Highest 2 September, 2025

    89.1 °F

Climate (2020–Present)

Portland, Portland-Troutdale Airport (2.5 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    56.1 °F

  • Average High 2020–2025

    65.1 °F
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