Weather Forecast for
O Fallon, MO

Overnight: Mostly clear, with a low around 29. Calm wind.

Monday: Sunny, with a high near 57. Calm wind becoming south around 5 mph in the afternoon.

Monday Night: Mostly clear, with a low around 43. Southeast wind 5 to 8 mph becoming west after midnight.

Tuesday: Sunny, with a high near 60. Northwest wind 6 to 8 mph.

Tuesday Night: Partly cloudy, with a low around 31. North wind 3 to 6 mph.

Wednesday: Mostly sunny, with a high near 51.

Wednesday Night: Mostly cloudy, with a low around 32.

Thursday: A 30 percent chance of rain after noon. Cloudy, with a high near 46.

Thursday Night: A 40 percent chance of rain. Cloudy, with a low around 33.

Friday: A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 45.

Friday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 31.

Saturday: A 40 percent chance of rain. Mostly cloudy, with a high near 45.

Saturday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 32.

Sunday: A 20 percent chance of rain. Mostly sunny, with a high near 47.

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