O'Fallon Rainfall Forecast

  • 30%
  • 20%
  • 5%
  • 20%
  • 45%
  • 35%
  • 15%
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  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

O'Fallon Rainfall Statistics

September Rainfall

Belleville, Scott AFB/MidAmerica Airport (4.3 miles)

  • Total Rainfall September

    1.4in

  • Daily Average September

    0.1in

  • Wettest Day 10 September, 2026

    1.1in

  • Wet Days September

    4/17 (24%)

Climate (2021–2025)

Belleville, Scott AFB/MidAmerica Airport (4.3 miles)

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  • Annual Average 2021–2025

    33.5in

  • Monthly Average 2021–2026

    2.9in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 11 May, 2022

    6.4in
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