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O Fallon, IL
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7-Day Forecast
Today
Rain then Chance Rain
High: 67°
Rain, mainly before 2pm.
High near 67.
South wind 8 to 15 mph
with gusts as high as 24 mph.
Chance of precipitation is 80%.
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Tonight
Cloudy
Low: 61°
Cloudy with a low around 61.
South wind 10 to 14 mph
with gusts as high as 21 mph.
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Sunday
Rain Likely then T-storms
High: 78°
A chance of rain and thunderstorms,
then rain and possibly a thunderstorm after 10am.
High near 78.
South wind 10 to 17 mph
with gusts as high as 25 mph.
Chance of precipitation is 80%.
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Sunday Night
T-storms Likely then Rain Likely
Low: 41°
Rain and thunderstorms likely before 10pm,
then rain likely and possibly a thunderstorm
between 10pm and 1am.
Mostly cloudy with a low around 41.
Northwest wind 11 to 14 mph
with gusts as high as 21 mph.
Chance of precipitation is 70%.
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Monday
Mostly Cloudy
High: 51°
Mostly cloudy with a high near 51.
Northwest wind 11 to 14 mph
with gusts as high as 22 mph.
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Monday Night
Partly Cloudy
Low: 33°
Partly cloudy with a low around 33.
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Tuesday
Mostly Sunny
High: 60°
Mostly sunny with a high near 60.
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Tuesday Night
Mostly Cloudy then Chance Rain
Low: 52°
A 50% chance of rain after 1am.
Mostly cloudy with a low around 52.
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Wednesday
Rain and Breezy
High: 74°
Rain and possibly a thunderstorm.
High near 74.
Breezy.
Chance of precipitation is 90%.
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Wednesday Night
Rain Likely
Low: 52°
Rain likely, mainly before 1am.
Mostly cloudy with a low around 52.
Chance of precipitation is 60%.
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Thursday
Chance Rain
High: 66°
A 50% chance of rain.
Partly sunny with a high near 66.
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Thursday Night
Chance Rain
Low: 49°
A 50% chance of rain and thunderstorms.
Mostly cloudy with a low around 49.
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Friday
Chance Rain
High: 68°
A 40% chance of rain and thunderstorms.
Partly sunny with a high near 68.
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Source: National Weather Service
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