Columbia River - Ackerman Island Rainfall Forecast

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Columbia River - Ackerman Island Rainfall Statistics

September Rainfall

Portland, Portland-Troutdale Airport (2.5 miles)

  • Total Rainfall September

    0.6in

  • Daily Average September

    0.04in

  • Wettest Day 14 September, 2025

    0.5in

  • Wet Days September

    2/18 (11%)

Climate (2010–Present)

Portland, Portland-Troutdale Airport (2.5 miles)

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  • Annual Average 2020–2024

    38.9in

  • Monthly Average 2020–2025

    3.2in

  • Daily Average 2020–2025

    0.1in

  • Wettest Day 10 June, 2022

    2.1in
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