Willamette River - Portland Morrison Street Bridge Rainfall Forecast

  • 15%
  • 15%
  • 35%
  • 30%
  • 15%
  • 40%
  • 45%
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Willamette River - Portland Morrison Street Bridge Rainfall Statistics

September Rainfall

Portland, Portland International Airport (5.6 miles)

  • Total Rainfall September

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  • Daily Average September

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  • Wettest Day 3 September, 2025

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  • Wet Days September

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Climate (2010–Present)

Portland, Portland International Airport (5.6 miles)

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  • Annual Average 2020–2024

    36.8in

  • Monthly Average 2020–2025

    3in

  • Daily Average 2020–2025

    0.1in

  • Wettest Day 26 December, 2022

    2.1in
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