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Current Weather Conditions for O Fallon, IL

Mostly clear, with a low around 74. Wind around 0 mph.
78°F

Conditions

Wind: 0 mph
Humidity: 82%
Probability of Precipitation: 3%

Hourly Forcast (next 12 hours)

6 AM 7 AM 8 AM 9 AM 10 AM 11 AM 12 PM 1 PM 2 PM 3 PM 4 PM 5 PM 6 PM
78° 76° 76° 75° 75° 74° 76° 79° 82° 87° 89° 90° 89°

Upcoming Week

Day Forecast High Low
Overnight
Mostly Clear
Mostly clear, with a low around 74. Wind around 0 mph.
89°F 70°F
Thursday
Showers And Thunderstorms Likely
Showers and thunderstorms likely after 10am. Mostly sunny. High near 91, with temperatures falling to around 86 in the afternoon. Heat index values as high as 101. East wind 0 to 3 mph. Chance of precipitation is 70%.
89°F 70°F
Thursday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly cloudy, with a low around 74. West wind 0 to 3 mph. Chance of precipitation is 40%.
89°F 70°F
Friday
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. West wind 1 to 8 mph. Chance of precipitation is 40%.
89°F 70°F
Friday Night
Chance Showers And Thunderstorms then Mostly Clear
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 75. West wind 2 to 6 mph. Chance of precipitation is 30%.
89°F 70°F
Saturday
Sunny
Sunny, with a high near 93.
89°F 70°F
Saturday Night
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 75. Chance of precipitation is 20%.
89°F 70°F
Sunday
Sunny
Sunny, with a high near 90.
89°F 70°F
Sunday Night
Mostly Clear
Mostly clear, with a low around 71.
89°F 70°F
Monday
Mostly Sunny
Mostly sunny, with a high near 93.
89°F 70°F
Monday Night
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. Chance of precipitation is 20%.
89°F 70°F
Tuesday
Slight Chance Showers And Thunderstorms then Mostly Sunny
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 93. Chance of precipitation is 20%.
89°F 70°F
Tuesday Night
Partly Cloudy
Partly cloudy, with a low around 70.
89°F 70°F
Wednesday
Mostly Sunny
Mostly sunny, with a high near 88.
89°F 70°F
Data provided by weather.gov