Columbia River - Ackerman Island Rainfall Forecast

  • 90%
  • 100%
  • 95%
  • 85%
  • 80%
  • 80%
  • 40%
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Columbia River - Ackerman Island Rainfall Statistics

December Rainfall

Portland, Portland-Troutdale Airport (2.5 miles)

  • Total Rainfall December

    6.3in

  • Daily Average December

    0.4in

  • Wettest Day 9 December, 2025

    2.1in

  • Wet Days December

    9/17 (53%)

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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