Columbia River - Cooper Island Rainfall Forecast

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  • 30%
  • 55%
  • 65%
  • 85%
  • 80%
  • 75%
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Columbia River - Cooper Island Rainfall Statistics

March Rainfall

Southwest Washington Regional Airport (16.8 miles)

  • Total Rainfall March

    2.3in

  • Daily Average March

    0.2in

  • Wettest Day 11 March, 2026

    1.5in

  • Wet Days March

    9/13 (69%)

Climate (2010–Present)

Southwest Washington Regional Airport (16.8 miles)

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  • Annual Average 2021–2025

    39.7in

  • Monthly Average 2021–2026

    3.2in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 4 November, 2022

    4.2in
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