Find the Best Places in the United States

Compare Cost of Living, Education, Income, Population, and More.

Current Weather Conditions for O Fallon, IL

Cloudy. Low around 36, with temperatures rising to around 40 overnight. Northwest wind around 20 mph, with gusts as high as 32 mph.
44°F

Conditions

Wind: 18 mph NW
Humidity: 82%
Probability of Precipitation: 7%

Hourly Forcast (next 12 hours)

7 AM 8 AM 9 AM 10 AM 11 AM 12 PM 1 PM 2 PM 3 PM 4 PM 5 PM 6 PM 7 PM
44° 43° 42° 41° 40° 39° 38° 37° 38° 38° 38° 38° 38°

Upcoming Week

Day Forecast High Low
Overnight
Cloudy
Cloudy. Low around 36, with temperatures rising to around 40 overnight. Northwest wind around 20 mph, with gusts as high as 32 mph.
71°F 54°F
Sunday
Chance Rain And Snow Showers
A chance of rain and snow showers. Partly sunny. High near 39, with temperatures falling to around 34 in the afternoon. Northwest wind 17 to 21 mph, with gusts as high as 32 mph.
71°F 54°F
Sunday Night
Chance Snow Showers
A chance of snow showers. Partly cloudy, with a low around 26. Northwest wind 13 to 16 mph, with gusts as high as 24 mph.
71°F 54°F
Monday
Sunny
Sunny. High near 40, with temperatures falling to around 36 in the afternoon. Northwest wind 9 to 17 mph.
71°F 54°F
Monday Night
Mostly Clear
Mostly clear, with a low around 26. Southwest wind 3 to 7 mph.
71°F 54°F
Veterans Day
Partly Sunny
Partly sunny, with a high near 53.
71°F 54°F
Tuesday Night
Mostly Clear
Mostly clear, with a low around 41.
71°F 54°F
Wednesday
Sunny
Sunny, with a high near 63.
71°F 54°F
Wednesday Night
Mostly Clear
Mostly clear, with a low around 35.
71°F 54°F
Thursday
Mostly Sunny
Mostly sunny, with a high near 62.
71°F 54°F
Thursday Night
Partly Cloudy
Partly cloudy, with a low around 45.
71°F 54°F
Friday
Sunny
Sunny, with a high near 71.
71°F 54°F
Friday Night
Partly Cloudy
Partly cloudy, with a low around 54.
71°F 54°F
Saturday
Mostly Sunny
Mostly sunny, with a high near 73.
71°F 54°F
Data provided by weather.gov