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Current Weather Conditions for O Fallon, IL

Mostly cloudy, with a low around 71. South wind 6 to 13 mph.
82°F

Conditions

Wind: 12 mph S
Humidity: 61%
Probability of Precipitation: 2%

Hourly Forcast (next 12 hours)

12 AM 1 AM 2 AM 3 AM 4 AM 5 AM 6 AM 7 AM 8 AM 9 AM 10 AM 11 AM 12 PM
82° 81° 79° 77° 76° 75° 74° 73° 73° 72° 71° 71° 72°

Upcoming Week

Day Forecast High Low
Tonight
Mostly Cloudy
Mostly cloudy, with a low around 71. South wind 6 to 13 mph.
92°F 76°F
Saturday
Partly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 89. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.
92°F 76°F
Saturday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind 1 to 9 mph. Chance of precipitation is 30%.
92°F 76°F
Sunday
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 86. Southeast wind 2 to 12 mph. Chance of precipitation is 60%.
92°F 76°F
Sunday Night
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 71. Southeast wind 7 to 12 mph. Chance of precipitation is 70%.
92°F 76°F
Monday
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 85. Chance of precipitation is 90%.
92°F 76°F
Monday Night
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 90%.
92°F 76°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 91. Chance of precipitation is 60%.
92°F 76°F
Tuesday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly clear, with a low around 74. Chance of precipitation is 30%.
92°F 76°F
Wednesday
Chance Showers And Thunderstorms then Sunny
A chance of showers and thunderstorms before 7am. Sunny, with a high near 93. Chance of precipitation is 30%.
92°F 76°F
Wednesday Night
Mostly Clear
Mostly clear, with a low around 75.
92°F 76°F
Thursday
Sunny
Sunny, with a high near 95.
92°F 76°F
Thursday Night
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 76. Chance of precipitation is 20%.
92°F 76°F
Friday
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%.
92°F 76°F
Data provided by weather.gov