O Fallon, IL

Current conditions, hourly and 7-day forecast, and live radar for O Fallon, IL 62269. Right now: chance showers and thunderstorms then showers and thunderstorms, 72°F. Data from the National Weather Service.

• Tonight: A chance of showers and thunderstorms between 8pm and midnight, then showers and thunderstorms between midnight and 3am, then a chance of showers and thunderstorms between 3am and 4am, then showers and thunderstorms likely. Mostly cloudy, with a low around 72. West wind 2 to 6 mph. Chance of precipitation is 80%.
• Thursday: Showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and 3pm. Cloudy, with a high near 82. North wind 2 to 6 mph. Chance of precipitation is 80%.
• Thursday Night: Mostly cloudy, with a low around 67. North wind 1 to 6 mph.
• Friday: Partly sunny, with a high near 83. East wind around 5 mph.
• Friday Night: Partly cloudy, with a low around 68. Southeast wind around 3 mph.
• Saturday: A slight chance of rain showers after 7am. Mostly sunny, with a high near 89. Chance of precipitation is 20%.