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Current Weather Conditions for O Fallon, IL

A slight chance of showers and thunderstorms between 9am and 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South wind 5 to 9 mph. Chance of precipitation is 50%.
67°F

Conditions

Wind: 5 mph S
Humidity: 81%
Probability of Precipitation: 2%

Hourly Forcast (next 12 hours)

12 PM 1 PM 2 PM 3 PM 4 PM 5 PM 6 PM 7 PM 8 PM 9 PM 10 PM 11 PM 12 AM
67° 70° 75° 78° 80° 81° 82° 84° 85° 85° 85° 84° 83°

Upcoming Week

Day Forecast High Low
Today
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 9am and 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South wind 5 to 9 mph. Chance of precipitation is 50%.
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Tonight
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before 11pm, then showers and thunderstorms likely between 11pm and 3am, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 68. Southwest wind 5 to 9 mph. Chance of precipitation is 70%.
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Sunday
Slight Chance Showers And Thunderstorms then Mostly Sunny
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 77. Northwest wind 12 to 15 mph. Chance of precipitation is 20%.
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Sunday Night
Partly Cloudy
Partly cloudy, with a low around 57. Northwest wind 2 to 13 mph.
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Monday
Mostly Sunny
Mostly sunny, with a high near 77. Northwest wind 2 to 7 mph.
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Monday Night
Mostly Clear
Mostly clear, with a low around 59.
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Tuesday
Mostly Sunny
Mostly sunny, with a high near 82.
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Tuesday Night
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 63. Chance of precipitation is 30%.
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Wednesday
Slight Chance Rain Showers then Chance Showers And Thunderstorms
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
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Wednesday Night
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Partly cloudy, with a low around 71. Chance of precipitation is 70%.
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Thursday
Rain Showers Likely
Rain showers likely. Partly sunny, with a high near 84. Chance of precipitation is 60%.
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Thursday Night
Chance Rain Showers
A chance of rain showers. Partly cloudy, with a low around 65. Chance of precipitation is 40%.
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Juneteenth
Chance Rain Showers
A chance of rain showers before 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 40%.
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Friday Night
Partly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 1am. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
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Data provided by weather.gov