BREAKING WEATHER:  AIRPORT DELAYS
Weather Forecast for
O Fallon, MO

Extreme Heat Warning

Overnight: A 30 percent chance of showers and thunderstorms, mainly between 3am and 4am. Patchy fog. Otherwise, mostly cloudy, with a low around 71. Calm wind.

Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 93. Heat index values as high as 107. Light southeast wind becoming south 5 to 9 mph in the morning.

Sunday Night: Increasing clouds, with a low around 74. South wind 5 to 7 mph.

Monday: Mostly sunny, with a high near 94. Heat index values as high as 107. South wind 6 to 9 mph.

Monday Night: Mostly clear, with a low around 75. South wind 6 to 8 mph.

Tuesday: Sunny, with a high near 95.

Tuesday Night: Clear, with a low around 75.

Wednesday: Sunny, with a high near 95.

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

Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94.

Thursday Night: Partly cloudy, with a low around 74.

Friday: Sunny, with a high near 93.

Friday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 74.

Independence Day: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 92.


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