O'Fallon Rainfall Forecast

  • No Rain
  • 5%
  • 45%
  • 45%
  • 35%
  • 40%
  • 35%
Graph Plots Open in Graphs

  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

O'Fallon Rainfall Statistics

September Rainfall

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

  • Total Rainfall September

    0.1in

  • Daily Average September

    0.01in

  • Wettest Day 4 September, 2025

    0.1in

  • Wet Days September

    2/17 (12%)

Climate (2010–Present)

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

Take a look at our website widgetsAvailable free! Find Out More

  • 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
Get WillyWeather+ to remove ads