Potomac River - Four Mile Run Entrance Rainfall Forecast

  • 60%
  • 55%
  • 75%
  • 65%
  • 50%
  • 20%
  • 10%
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Potomac River - Four Mile Run Entrance Rainfall Statistics

September Rainfall

Washington/Reagan National Airport, DC (0.6 miles)

  • Total Rainfall September

    2.3in

  • Daily Average September

    0.1in

  • Wettest Day 3 September, 2026

    1.3in

  • Wet Days September

    4/20 (20%)

Climate (2021–2025)

Washington/Reagan National Airport, DC (0.6 miles)

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  • Annual Average 2021–2025

    39.2in

  • Monthly Average 2021–2026

    3in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 9 July, 2022

    4.1in
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