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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 11:44 AM and don’t miss the sunset at 12:23 AM. Today’s winds are traveling east-southeast at a speed of 6 MPH. The temperature feels like 64 with a humidity level of 81. Cloud coverage is 83 percent with 9.6 percent visibility. Today’s UV index is 2 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 4/1
Thunderstorm with heavy rain
Wednesday 4/1 Weather forecast for O'Fallon, Illinois, Thunderstorm with heavy rain
64°F
High: 70°F
Low: 63°F
Precipitation: 85%
Thursday 4/2
Thunderstorm with rain

Thursday 4/2 Weather forecast for O'Fallon, Illinois, Thunderstorm with rain
70°F
High: 77°F
Low: 63°F
Precipitation: 45%
Friday 4/3
Thunderstorm with rain

Friday 4/3 Weather forecast for O'Fallon, Illinois, Thunderstorm with rain
72°F
High: 81°F
Low: 60°F
Precipitation: 80%
Saturday 4/4
Thunderstorm with heavy rain
Saturday 4/4 Weather forecast for O'Fallon, Illinois, Thunderstorm with heavy rain
60°F
High: 63°F
Low: 40°F
Precipitation: 95%
Sunday 4/5
Light shower rain

Sunday 4/5 Weather forecast for O'Fallon, Illinois, Light shower rain
49°F
High: 58°F
Low: 38°F
Precipitation: 55%
Monday 4/6
Few clouds

Monday 4/6 Weather forecast for O'Fallon, Illinois, Few clouds
50°F
High: 65°F
Low: 44°F
Precipitation: 0%

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