O'Fallon Rainfall Forecast

  • 85%
  • 60%
  • 90%
  • 35%
  • 5%
  • 5%
  • 15%
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  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

O'Fallon Rainfall Statistics

October Rainfall

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

  • Total Rainfall October

    1.4in

  • Daily Average October

    0.1in

  • Wettest Day 18 October, 2025

    1.3in

  • Wet Days October

    4/27 (15%)

Climate (2010–Present)

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

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  • Annual Average 2020–2024

    39.7in

  • Monthly Average 2020–2025

    3.3in

  • Daily Average 2020–2025

    0.1in

  • Wettest Day 4 April, 2025

    4.2in
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