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Current Weather Conditions for O Fallon, MO

Showers and thunderstorms likely before 10pm, then a chance of showers and thunderstorms between 10pm and 11pm, then a slight chance of showers and thunderstorms between 11pm and midnight. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 67. Northwest wind 5 to 10 mph. Chance of precipitation is 70%.
79°F

Conditions

Wind: 10 mph NW
Humidity: 82%
Probability of Precipitation: 66%

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
79° 77° 75° 73° 71° 71° 71° 70° 69° 69° 68° 68° 69°

Upcoming Week

Day Forecast High Low
Tonight
Showers And Thunderstorms Likely then Mostly Cloudy
Showers and thunderstorms likely before 10pm, then a chance of showers and thunderstorms between 10pm and 11pm, then a slight chance of showers and thunderstorms between 11pm and midnight. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 67. Northwest wind 5 to 10 mph. Chance of precipitation is 70%.
86°F 73°F
Tuesday
Mostly Sunny
Mostly sunny, with a high near 86. Northwest wind 6 to 9 mph.
86°F 73°F
Tuesday Night
Mostly Clear then Patchy Fog
Patchy fog after 5am. Mostly clear, with a low around 64. Northwest wind 1 to 6 mph.
86°F 73°F
Wednesday
Patchy Fog then Sunny
Patchy fog before 7am. Sunny, with a high near 88. West wind around 3 mph.
86°F 73°F
Wednesday Night
Mostly Clear
Mostly clear, with a low around 67. West wind around 2 mph.
86°F 73°F
Thursday
Sunny
Sunny, with a high near 91.
86°F 73°F
Thursday Night
Mostly Clear
Mostly clear, with a low around 71.
86°F 73°F
Independence Day
Sunny
Sunny, with a high near 93.
86°F 73°F
Friday Night
Partly Cloudy
Partly cloudy, with a low around 73.
86°F 73°F
Saturday
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 20%.
86°F 73°F
Saturday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 40%.
86°F 73°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 91. Chance of precipitation is 40%.
86°F 73°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 72. Chance of precipitation is 40%.
86°F 73°F
Monday
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
86°F 73°F
Data provided by weather.gov