Knappa Slough - Knappa Rainfall Forecast

  • 25%
  • 55%
  • 65%
  • 90%
  • 95%
  • 85%
  • 60%
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Knappa Slough - Knappa Rainfall Statistics

March Rainfall

Astoria, Astoria Regional Airport (13.7 miles)

  • Total Rainfall March

    4.2in

  • Daily Average March

    0.4in

  • Wettest Day 11 March, 2026

    1.9in

  • Wet Days March

    10/14 (71%)

Climate (2010–Present)

Astoria, Astoria Regional Airport (13.7 miles)

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  • Annual Average 2021–2025

    65.5in

  • Monthly Average 2021–2026

    5.2in

  • Daily Average 2021–2026

    0.2in

  • Wettest Day 6 January, 2022

    5.1in
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