63366 Weather (O'Fallon, MO)

Weather forecast for: 2 Miles NNE Saint Louis MO

Last Update: 8:11 am CDT Sep 7, 2026

Labor Day: Sunny, with a high near 89. East wind around 8 mph.

Tonight: Mostly clear, with a low around 65. East wind 3 to 7 mph.

Tuesday: Mostly sunny, with a high near 96. South wind 3 to 6 mph.

Tuesday Night: Partly cloudy, with a low around 74. South wind 5 to 7 mph.

Wednesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 99. South wind 7 to 9 mph becoming west in the afternoon. Chance of precipitation is 20%.

Wednesday Night: Showers and possibly a thunderstorm. Low around 72. Chance of precipitation is 80%.

Thursday: A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84.

Thursday Night: Partly cloudy, with a low around 65.

Friday: Mostly sunny, with a high near 87.

Friday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69.

Saturday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Saturday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 70.

Sunday: A 20 percent chance of showers. Sunny, with a high near 91.