Columbia River - Westport Slough Entrance Rainfall Forecast

  • No Rain
  • No Rain
  • 60%
  • 65%
  • 20%
  • 40%
  • 45%
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Columbia River - Westport Slough Entrance Rainfall Statistics

September Rainfall

Southwest Washington Regional Airport (23 miles)

  • Total Rainfall September

    0.1in

  • Daily Average September

    0in

  • Wettest Day 14 September, 2025

    0.04in

  • Wet Days September

    2/18 (11%)

Climate (2010–Present)

Southwest Washington Regional Airport (23 miles)

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  • Annual Average 2020–2024

    39.1in

  • Monthly Average 2020–2025

    3.2in

  • Daily Average 2020–2025

    0.1in

  • Wettest Day 4 November, 2022

    4.2in
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