Weather Forecast for
Zip Code 63366 O Fallon, MO


Overnight: Showers and possibly a thunderstorm. Low around 69. Southeast wind 3 to 5 mph. Chance of precipitation is 100%.

Friday: Showers and possibly a thunderstorm, mainly before 1pm, then showers and thunderstorms likely after 1pm. High near 81. Southeast wind around 7 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 66. North wind around 6 mph becoming calm in the evening.

Saturday: A slight chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 85. Calm wind. Chance of precipitation is 20%.

Saturday Night: A 40 percent chance of showers and thunderstorms, mainly between 7pm and 1am. Partly cloudy, with a low around 72. Southeast wind around 6 mph.

Sunday: Sunny, with a high near 94.

Sunday Night: Mostly clear, with a low around 75.

Monday: Sunny and hot, with a high near 97.

Monday Night: Mostly clear, with a low around 76.

Tuesday: Sunny and hot, with a high near 98.

Tuesday Night: Clear, with a low around 76.

Wednesday: Sunny and hot, with a high near 98.

Wednesday Night: Mostly clear, with a low around 76.

Thursday: Sunny and hot, with a high near 97.

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