Hourly Weather Forecast - O'Fallon, IL

11 AM
44°F
0%
12mph
SW
Mostly Sunny
Humidity
63%
Feels like
38°F
Dew Point
33°F
12 PM
47°F
0%
12mph
SW
Mostly Sunny
Humidity
59%
Feels like
41°F
Dew Point
33°F
1 PM
49°F
0%
13mph
SSW
Partly Cloudy
Humidity
57%
Feels like
43°F
Dew Point
34°F
2 PM
49°F
0%
13mph
SSW
Mostly Sunny
Humidity
57%
Feels like
44°F
Dew Point
35°F
3 PM
48°F
0%
13mph
S
Partly Cloudy
Humidity
60%
Feels like
43°F
Dew Point
35°F
4 PM
47°F
0%
14mph
S
Mostly Cloudy
Humidity
63%
Feels like
41°F
Dew Point
35°F
4:38 PM
5 PM
45°F
0%
15mph
S
Mostly Cloudy
Humidity
67%
Feels like
39°F
Dew Point
35°F
6 PM
45°F
10%
16mph
S
Partly Cloudy
Humidity
68%
Feels like
37°F
Dew Point
35°F
7 PM
44°F
0%
17mph
SSW
Partly Cloudy
Humidity
67%
Feels like
37°F
Dew Point
34°F
8 PM
44°F
0%
17mph
SSW
Partly Cloudy
Humidity
67%
Feels like
37°F
Dew Point
34°F
9 PM
45°F
0%
16mph
SSW
Mostly Cloudy
Humidity
67%
Feels like
37°F
Dew Point
34°F
10 PM
45°F
10%
16mph
SW
Mostly Cloudy
Humidity
65%
Feels like
38°F
Dew Point
34°F
11 PM
46°F
10%
15mph
SW
Mostly Cloudy
Humidity
64%
Feels like
39°F
Dew Point
34°F

Rainfall Forecast for Northwest through Thursday

Heavy Rain, Flooding Soaks The Northwest

A fast-moving series of atmospheric rivers continue to drench the Pacific Northwest today through Thursday.

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide