O'Fallon, Illinois hotel brands & chains

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Weather Forecast for O'Fallon, Illinois

Traveling to O'Fallon, Illinois? Here is your 6-day weather forecast in the area. Whether it is a warm weather destinations or cold climate don’t forget to consider weather, while you pack your bags for this trip. Start your day when the sunrises at 1:16 PM and don’t miss the sunset at 11:02 PM. Today’s winds are traveling west-northwest at a speed of 8 MPH. The temperature feels like 8 with a humidity level of 78. Cloud coverage is 13 percent with 13 percent visibility. Today’s UV index is 3 make sure to prepare properly. Make sure to plan your travel itinerary to match your travel weather forecast to make the most of your vacation with Reservations.com.


Fahrenheit / Celsius
Today 1/13
Few clouds

Monday 1/13 Weather forecast for O'Fallon, Illinois, Few clouds
19°F
High: 25°F
Low: 12°F
Precipitation: 0%
Tuesday 1/14
Scattered clouds

Tuesday 1/14 Weather forecast for O'Fallon, Illinois, Scattered clouds
18°F
High: 27°F
Low: 6°F
Precipitation: 0%
Wednesday 1/15
Few clouds

Wednesday 1/15 Weather forecast for O'Fallon, Illinois, Few clouds
17°F
High: 30°F
Low: 21°F
Precipitation: 0%
Thursday 1/16
Few clouds

Thursday 1/16 Weather forecast for O'Fallon, Illinois, Few clouds
32°F
High: 39°F
Low: 29°F
Precipitation: 0%
Friday 1/17
Light shower rain

Friday 1/17 Weather forecast for O'Fallon, Illinois, Light shower rain
37°F
High: 44°F
Low: 32°F
Precipitation: 55%
Saturday 1/18
Mix snow/rain

Saturday 1/18 Weather forecast for O'Fallon, Illinois, Mix snow/rain
36°F
High: 41°F
Low: 22°F
Precipitation: 90%

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