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Current Weather Conditions for O Fallon, IL

Mostly sunny, with a high near 96. Heat index values as high as 109. South wind around 14 mph.
93°F

Conditions

Wind: 13 mph S
Humidity: 60%
Probability of Precipitation: 1%

Hourly Forcast (next 12 hours)

8 PM 9 PM 10 PM 11 PM 12 AM 1 AM 2 AM 3 AM 4 AM 5 AM 6 AM 7 AM 8 AM
93° 94° 94° 95° 92° 90° 86° 85° 83° 81° 80° 79° 78°

Upcoming Week

Day Forecast High Low
This Afternoon
Mostly Sunny
Mostly sunny, with a high near 96. Heat index values as high as 109. South wind around 14 mph.
95°F 77°F
Tonight
Mostly Clear
Mostly clear, with a low around 76. Heat index values as high as 112. South wind 5 to 14 mph.
95°F 77°F
Tuesday
Sunny
Sunny, with a high near 97. Heat index values as high as 110. Southwest wind 5 to 9 mph.
95°F 77°F
Tuesday Night
Mostly Clear
Mostly clear, with a low around 76. Heat index values as high as 110. South wind 3 to 9 mph.
95°F 77°F
Wednesday
Sunny
Sunny, with a high near 97. South wind 3 to 9 mph.
95°F 77°F
Wednesday Night
Clear
Clear, with a low around 77.
95°F 77°F
Thursday
Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Chance of precipitation is 20%.
95°F 77°F
Thursday Night
Slight Chance Showers And Thunderstorms then Mostly Clear
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 77. Chance of precipitation is 20%.
95°F 77°F
Friday
Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Chance of precipitation is 30%.
95°F 77°F
Friday Night
Chance Showers And Thunderstorms then Partly Cloudy
A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 76. Chance of precipitation is 30%.
95°F 77°F
Independence Day
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Chance of precipitation is 20%.
95°F 77°F
Saturday Night
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 30%.
95°F 77°F
Sunday
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 40%.
95°F 77°F
Sunday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 40%.
95°F 77°F
Data provided by weather.gov