Hourly Weather Forecast - O'Fallon, IL

12 AM
64°F
0%
11mph
SSW
Partly Cloudy
Humidity
91%
Feels like
64°F
Dew Point
61°F
1 AM
63°F
0%
10mph
SSW
Partly Cloudy
Humidity
91%
Feels like
63°F
Dew Point
60°F
2 AM
63°F
10%
10mph
SSW
Partly Cloudy
Humidity
91%
Feels like
63°F
Dew Point
60°F
3 AM
62°F
10%
9mph
SSW
Partly Cloudy
Humidity
91%
Feels like
62°F
Dew Point
59°F
4 AM
62°F
10%
9mph
SSW
Partly Cloudy
Humidity
90%
Feels like
62°F
Dew Point
59°F
5 AM
60°F
10%
9mph
SSW
Partly Cloudy
Humidity
93%
Feels like
60°F
Dew Point
58°F
6 AM
59°F
10%
9mph
SSW
Partly Cloudy
Humidity
96%
Feels like
59°F
Dew Point
58°F
7 AM
59°F
10%
9mph
SSW
Partly Cloudy
Humidity
96%
Feels like
59°F
Dew Point
58°F
7:15 AM
8 AM
61°F
0%
9mph
SSW
Partly Cloudy
Humidity
91%
Feels like
61°F
Dew Point
58°F
9 AM
64°F
0%
10mph
SSW
Partly Cloudy
Humidity
84%
Feels like
64°F
Dew Point
59°F
10 AM
66°F
0%
11mph
SSW
Partly Cloudy
Humidity
78%
Feels like
66°F
Dew Point
59°F
11 AM
69°F
0%
12mph
SSW
Partly Cloudy
Humidity
73%
Feels like
69°F
Dew Point
60°F
12 PM
71°F
0%
12mph
SSW
Partly Cloudy
Humidity
68%
Feels like
71°F
Dew Point
60°F
1 PM
72°F
0%
12mph
SSW
Partly Cloudy
Humidity
65%
Feels like
72°F
Dew Point
60°F
2 PM
72°F
0%
12mph
SSW
Partly Cloudy
Humidity
65%
Feels like
72°F
Dew Point
60°F
3 PM
71°F
0%
12mph
SSW
Partly Cloudy
Humidity
68%
Feels like
71°F
Dew Point
60°F
4 PM
69°F
0%
11mph
SSW
Partly Cloudy
Humidity
73%
Feels like
69°F
Dew Point
60°F
4:44 PM
5 PM
66°F
0%
10mph
SSW
Partly Cloudy
Humidity
79%
Feels like
66°F
Dew Point
60°F
6 PM
65°F
0%
10mph
SSW
Partly Cloudy
Humidity
82%
Feels like
65°F
Dew Point
60°F
7 PM
65°F
0%
10mph
SSW
Partly Cloudy
Humidity
83%
Feels like
65°F
Dew Point
60°F
8 PM
65°F
0%
10mph
SSW
Partly Cloudy
Humidity
83%
Feels like
65°F
Dew Point
59°F
9 PM
64°F
0%
10mph
SSW
Partly Cloudy
Humidity
84%
Feels like
64°F
Dew Point
59°F
10 PM
64°F
0%
9mph
SSW
Partly Cloudy
Humidity
83%
Feels like
64°F
Dew Point
59°F
11 PM
64°F
0%
9mph
SW
Partly Cloudy
Humidity
84%
Feels like
64°F
Dew Point
59°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Weekend Weather Outlook

Weekend Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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