Hourly Weather Forecast - O'Fallon, IL

12 AM
37°F
0%
8mph
SSE
Cloudy
Humidity
72%
Feels like
30°F
Dew Point
28°F
1 AM
36°F
0%
8mph
SSE
Cloudy
Humidity
75%
Feels like
30°F
Dew Point
29°F
2 AM
36°F
0%
7mph
SSE
Cloudy
Humidity
77%
Feels like
30°F
Dew Point
29°F
3 AM
36°F
0%
7mph
SSE
Cloudy
Humidity
79%
Feels like
30°F
Dew Point
30°F
4 AM
36°F
0%
6mph
S
Cloudy
Humidity
81%
Feels like
30°F
Dew Point
30°F
5 AM
35°F
0%
6mph
SW
Cloudy
Humidity
85%
Feels like
30°F
Dew Point
31°F
6 AM
35°F
10%
6mph
WSW
Cloudy
Humidity
87%
Feels like
30°F
Dew Point
32°F
7 AM
36°F
10%
6mph
W
Cloudy
Humidity
86%
Feels like
31°F
Dew Point
32°F
7:07 AM
8 AM
38°F
10%
7mph
WNW
Mostly Cloudy
Humidity
80%
Feels like
33°F
Dew Point
33°F
9 AM
41°F
10%
8mph
NW
Mostly Cloudy
Humidity
74%
Feels like
36°F
Dew Point
33°F
10 AM
43°F
10%
9mph
NW
Partly Cloudy
Humidity
69%
Feels like
38°F
Dew Point
34°F
11 AM
45°F
10%
10mph
NW
Mostly Sunny
Humidity
64%
Feels like
40°F
Dew Point
34°F
12 PM
46°F
20%
11mph
NW
Mostly Sunny
Humidity
62%
Feels like
41°F
Dew Point
33°F
1 PM
46°F
10%
11mph
NW
Mostly Sunny
Humidity
61%
Feels like
40°F
Dew Point
33°F
2 PM
44°F
10%
12mph
NW
Partly Cloudy
Humidity
63%
Feels like
38°F
Dew Point
33°F
3 PM
42°F
10%
12mph
NNW
Partly Cloudy
Humidity
66%
Feels like
36°F
Dew Point
32°F
4 PM
40°F
10%
11mph
NNW
Partly Cloudy
Humidity
70%
Feels like
34°F
Dew Point
31°F
4:38 PM
5 PM
39°F
0%
10mph
NNW
Partly Cloudy
Humidity
71%
Feels like
33°F
Dew Point
31°F
6 PM
39°F
0%
9mph
NNW
Partly Cloudy
Humidity
70%
Feels like
33°F
Dew Point
30°F
7 PM
38°F
0%
9mph
NNW
Partly Cloudy
Humidity
70%
Feels like
32°F
Dew Point
29°F
8 PM
37°F
0%
9mph
NNW
Partly Cloudy
Humidity
72%
Feels like
30°F
Dew Point
28°F
9 PM
35°F
0%
9mph
NNW
Partly Cloudy
Humidity
75%
Feels like
28°F
Dew Point
28°F
10 PM
34°F
0%
8mph
NNW
Partly Cloudy
Humidity
76%
Feels like
27°F
Dew Point
27°F
11 PM
33°F
0%
8mph
NNW
Partly Cloudy
Humidity
75%
Feels like
26°F
Dew Point
26°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