Hourly Weather Forecast - O'Fallon, IL

12 AM
46°F
10%
15mph
SW
Cloudy
Humidity
64%
Feels like
40°F
Dew Point
34°F
1 AM
46°F
10%
15mph
WSW
Mostly Cloudy
Humidity
64%
Feels like
40°F
Dew Point
35°F
2 AM
47°F
10%
14mph
WSW
Mostly Cloudy
Humidity
64%
Feels like
41°F
Dew Point
35°F
3 AM
47°F
10%
14mph
WSW
Cloudy
Humidity
65%
Feels like
42°F
Dew Point
36°F
4 AM
48°F
10%
14mph
W
Mostly Cloudy
Humidity
65%
Feels like
42°F
Dew Point
37°F
5 AM
47°F
10%
15mph
W
Partly Cloudy
Humidity
68%
Feels like
40°F
Dew Point
37°F
6 AM
46°F
0%
17mph
WNW
Cloudy
Humidity
69%
Feels like
39°F
Dew Point
36°F
7 AM
45°F
0%
19mph
WNW
Cloudy
Humidity
68%
Feels like
37°F
Dew Point
35°F
7:06 AM
8 AM
45°F
0%
21mph
WNW
Windy
Humidity
63%
Feels like
36°F
Dew Point
33°F
9 AM
44°F
0%
22mph
WNW
Windy
Humidity
59%
Feels like
35°F
Dew Point
31°F
10 AM
43°F
0%
23mph
WNW
Windy
Humidity
57%
Feels like
34°F
Dew Point
29°F
11 AM
42°F
0%
23mph
NW
Windy
Humidity
56%
Feels like
33°F
Dew Point
28°F
12 PM
41°F
0%
22mph
NW
Windy
Humidity
56%
Feels like
31°F
Dew Point
26°F
1 PM
40°F
10%
20mph
NW
Mostly Cloudy
Humidity
57%
Feels like
30°F
Dew Point
26°F
2 PM
39°F
10%
19mph
NW
Partly Cloudy
Humidity
58%
Feels like
30°F
Dew Point
25°F
3 PM
38°F
10%
17mph
NW
Partly Cloudy
Humidity
60%
Feels like
28°F
Dew Point
25°F
4 PM
37°F
0%
15mph
NW
Partly Cloudy
Humidity
63%
Feels like
28°F
Dew Point
25°F
4:38 PM
5 PM
36°F
0%
13mph
NW
Partly Cloudy
Humidity
65%
Feels like
27°F
Dew Point
25°F
6 PM
36°F
0%
12mph
NW
Partly Cloudy
Humidity
65%
Feels like
27°F
Dew Point
25°F
7 PM
35°F
0%
11mph
NW
Partly Cloudy
Humidity
65%
Feels like
27°F
Dew Point
25°F
8 PM
35°F
0%
11mph
NW
Mostly Cloudy
Humidity
66%
Feels like
27°F
Dew Point
24°F
9 PM
34°F
0%
10mph
NW
Cloudy
Humidity
69%
Feels like
26°F
Dew Point
25°F
10 PM
33°F
0%
10mph
NW
Cloudy
Humidity
70%
Feels like
25°F
Dew Point
24°F
11 PM
33°F
0%
9mph
NW
Cloudy
Humidity
71%
Feels like
25°F
Dew Point
24°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