Zip Code 63366 O Fallon, MO
Today: Mostly cloudy, with a high near 94. Heat index values as high as 105. Southwest wind 5 to 8 mph.
Tonight: Mostly clear, with a low around 78. South wind 3 to 6 mph.
Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 78. Southwest wind 3 to 6 mph.
Wednesday: A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 95. Southwest wind 5 to 7 mph.
Wednesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Thursday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 91.
Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Friday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Saturday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Saturday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Sunday: Mostly sunny, with a high near 89.
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