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O Fallon, IL
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7-Day Forecast
Today
Becoming Sunny and Breezy
High: 44°
Cloudy through mid morning,
then gradual clearing with a high near 44.
Breezy with a northwest wind 20 to 22 mph
with gusts as high as 32 mph.
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Tonight
Partly Cloudy and Breezy then Mostly Cloudy
Low: 35°
Mostly cloudy with a low around 35.
Breezy with a northwest wind 13 to 21 mph
with gusts as high as 32 mph.
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Friday
Partly Sunny
High: 47°
Partly sunny with a high near 47.
Northwest wind 8 to 14 mph
with gusts as high as 21 mph.
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Friday Night
Partly Cloudy
Low: 31°
Partly cloudy with a low around 31.
Northwest wind 5 to 7 mph becoming calm in the evening.
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Saturday
Sunny
High: 53°
Sunny with a high near 53.
Light and variable wind.
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Saturday Night
Partly Cloudy
Low: 37°
Partly cloudy with a low around 37.
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Sunday
Mostly Sunny
High: 62°
Mostly sunny with a high near 62.
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Sunday Night
Chance Rain
Low: 51°
A 50% chance of rain.
Mostly cloudy with a low around 51.
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Monday
Chance Rain
High: 58°
A 30% chance of rain, mainly before noon.
Partly sunny with a high near 58.
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Monday Night
Mostly Clear
Low: 30°
Mostly clear with a low around 30.
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Tuesday
Mostly Sunny
High: 44°
Mostly sunny with a high near 44.
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Tuesday Night
Slight Chance Rain
Low: 29°
A 20% chance of rain.
Mostly cloudy with a low around 29.
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Wednesday
Chance Rain
High: 44°
A 30% chance of rain.
Partly sunny with a high near 44.
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Source: National Weather Service
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