Potomac River - Four Mile Run Entrance Rainfall Forecast

  • No Rain
  • 5%
  • 5%
  • 55%
  • 30%
  • 5%
  • 10%
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Potomac River - Four Mile Run Entrance Rainfall Statistics

March Rainfall

Washington/Reagan National Airport, DC (0.6 miles)

  • Total Rainfall March

    1.8in

  • Daily Average March

    0.1in

  • Wettest Day 16 March, 2026

    0.6in

  • Wet Days March

    9/24 (38%)

Climate (2010–Present)

Washington/Reagan National Airport, DC (0.6 miles)

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  • Annual Average 2021–2025

    39.2in

  • Monthly Average 2021–2026

    3.3in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 9 July, 2022

    4.1in
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