Find the Best Places in the United States

Compare Cost of Living, Education, Income, Population, and More.

Current Weather Conditions for O Fallon, IL

Partly cloudy, with a low around 67. South wind 8 to 12 mph.
81°F

Conditions

Wind: 12 mph S
Humidity: 53%
Probability of Precipitation: 0%

Hourly Forcast (next 12 hours)

11 PM 12 AM 1 AM 2 AM 3 AM 4 AM 5 AM 6 AM 7 AM 8 AM 9 AM 10 AM 11 AM
81° 80° 78° 75° 73° 72° 71° 70° 69° 69° 68° 67° 68°

Upcoming Week

Day Forecast High Low
Tonight
Partly Cloudy
Partly cloudy, with a low around 67. South wind 8 to 12 mph.
89°F 75°F
Friday
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 3pm and 4pm. Mostly sunny, with a high near 88. South wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
89°F 75°F
Friday Night
Partly Cloudy
Partly cloudy, with a low around 71. South wind 6 to 14 mph.
89°F 75°F
Saturday
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 91. Southwest wind around 8 mph. Chance of precipitation is 20%.
89°F 75°F
Saturday Night
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South wind 2 to 7 mph. Chance of precipitation is 20%.
89°F 75°F
Sunday
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a high near 88. Chance of precipitation is 40%.
89°F 75°F
Sunday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
89°F 75°F
Monday
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 86. Chance of precipitation is 80%.
89°F 75°F
Monday Night
Showers And Thunderstorms then Chance Showers And Thunderstorms
Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 71. Chance of precipitation is 80%.
89°F 75°F
Tuesday
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers and thunderstorms likely before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 60%.
89°F 75°F
Tuesday 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 72. Chance of precipitation is 30%.
89°F 75°F
Wednesday
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 30%.
89°F 75°F
Wednesday Night
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 20%.
89°F 75°F
Thursday
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 20%.
89°F 75°F
Data provided by weather.gov