Weather Forecast for
O Fallon, MO


Tonight: Clear, with a low around 46. North wind around 6 mph becoming calm in the evening.

Thursday: Sunny, with a high near 75. Calm wind becoming south around 6 mph in the afternoon.

Thursday Night: A slight chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 56. Southeast wind around 8 mph. Chance of precipitation is 40%.

Friday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83. South wind 9 to 13 mph, with gusts as high as 24 mph.

Friday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 65. South wind 5 to 8 mph. Chance of precipitation is 40%.

Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 70%.

Saturday Night: Mostly cloudy, with a low around 65.

Sunday: Mostly sunny, with a high near 88.

Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 71.

Monday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.

Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

Tuesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81. Chance of precipitation is 70%.

Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.

Wednesday: A 30 percent chance of showers. Partly sunny, with a high near 77.

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