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Current Weather Conditions for O Fallon, IL

Mostly sunny, with a high near 88. Heat index values as high as 100. Southwest wind around 3 mph.

88°F

Conditions

Wind: 3 mph SW
Humidity: 70%
Probability of Precipitation: 5%

Hourly Forcast (next 12 hours)

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Upcoming Week

Day	Forecast	High	Low
This Afternoon	Mostly Sunny Mostly sunny, with a high near 88. Heat index values as high as 100. Southwest wind around 3 mph.	88°F	71°F
Tonight	Partly Cloudy Partly cloudy, with a low around 74. Southwest wind 0 to 3 mph.	88°F	71°F
Sunday	Mostly Sunny then Isolated Showers And Thunderstorms Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 94. Heat index values as high as 106. West wind 0 to 3 mph. Chance of precipitation is 20%.	88°F	71°F
Sunday Night	Isolated Showers And Thunderstorms then Partly Cloudy Isolated showers and thunderstorms before 7pm. Partly cloudy, with a low around 77. Heat index values as high as 110. Southwest wind around 3 mph. Chance of precipitation is 20%.	88°F	71°F
Monday	Mostly Sunny Mostly sunny, with a high near 98. Southwest wind 3 to 10 mph.	88°F	71°F
Monday Night	Mostly Clear Mostly clear, with a low around 78.	88°F	71°F
Tuesday	Sunny Sunny, with a high near 93.	88°F	71°F
Tuesday Night	Partly Cloudy Partly cloudy, with a low around 71.	88°F	71°F
Wednesday	Sunny Sunny, with a high near 89.	88°F	71°F
Wednesday Night	Mostly Clear Mostly clear, with a low around 68.	88°F	71°F
Thursday	Sunny Sunny, with a high near 88.	88°F	71°F
Thursday Night	Partly Cloudy Partly cloudy, with a low around 69.	88°F	71°F
Friday	Slight Chance Rain Showers A slight chance of rain showers between 7am and 1pm. Partly sunny, with a high near 88. Chance of precipitation is 20%.	88°F	71°F
Friday Night	Partly Cloudy then Slight Chance Showers And Thunderstorms A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.	88°F	71°F
Data provided by weather.gov