Columbia River - Knapp Landing Rainfall Forecast

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Columbia River - Knapp Landing Rainfall Statistics

September Rainfall

Scappoose Industrial Airpark (5.6 miles)

  • Total Rainfall September

    0.04in

  • Daily Average September

    0in

  • Wettest Day 8 September, 2025

    0.03in

  • Wet Days September

    2/15 (13%)

Climate (2010–Present)

Scappoose Industrial Airpark (5.6 miles)

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  • Annual Average 2020–2024

    36.7in

  • Monthly Average 2020–2025

    3in

  • Daily Average 2020–2025

    0.1in

  • Wettest Day 4 November, 2022

    3.1in
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