Hourly Weather Forecast - O'Fallon, IL

12 AM
32°F
0%
7mph
SE
Partly Cloudy
Humidity
66%
Feels like
26°F
Dew Point
22°F
1 AM
32°F
0%
7mph
SE
Partly Cloudy
Humidity
67%
Feels like
25°F
Dew Point
22°F
2 AM
31°F
0%
7mph
SE
Mostly Clear
Humidity
66%
Feels like
25°F
Dew Point
21°F
3 AM
31°F
10%
7mph
SE
Partly Cloudy
Humidity
68%
Feels like
24°F
Dew Point
22°F
4 AM
31°F
10%
7mph
SE
Mostly Clear
Humidity
72%
Feels like
24°F
Dew Point
22°F
5 AM
31°F
10%
7mph
SE
Mostly Clear
Humidity
70%
Feels like
23°F
Dew Point
22°F
6 AM
31°F
10%
7mph
SE
Mostly Clear
Humidity
70%
Feels like
24°F
Dew Point
22°F
7 AM
33°F
10%
8mph
SE
Partly Cloudy
Humidity
63%
Feels like
26°F
Dew Point
22°F
7:14 AM
8 AM
36°F
10%
8mph
SE
Mostly Cloudy
Humidity
60%
Feels like
30°F
Dew Point
23°F
9 AM
38°F
10%
8mph
SE
Cloudy
Humidity
56%
Feels like
33°F
Dew Point
24°F
10 AM
40°F
10%
8mph
SE
Mostly Cloudy
Humidity
54%
Feels like
35°F
Dew Point
25°F
11 AM
42°F
10%
9mph
SE
Mostly Cloudy
Humidity
52%
Feels like
37°F
Dew Point
26°F
12 PM
44°F
10%
9mph
SSE
Partly Cloudy
Humidity
49%
Feels like
38°F
Dew Point
26°F
1 PM
45°F
10%
9mph
SSE
Partly Cloudy
Humidity
49%
Feels like
40°F
Dew Point
27°F
2 PM
46°F
10%
9mph
SSE
Mostly Cloudy
Humidity
49%
Feels like
41°F
Dew Point
28°F
3 PM
46°F
0%
9mph
SSE
Mostly Cloudy
Humidity
51%
Feels like
41°F
Dew Point
29°F
4 PM
45°F
0%
9mph
SSE
Mostly Cloudy
Humidity
55%
Feels like
40°F
Dew Point
30°F
4:42 PM
5 PM
44°F
0%
9mph
SSE
Mostly Cloudy
Humidity
60%
Feels like
39°F
Dew Point
31°F
6 PM
44°F
0%
9mph
SSE
Mostly Cloudy
Humidity
59%
Feels like
39°F
Dew Point
31°F
7 PM
44°F
10%
9mph
SSE
Mostly Cloudy
Humidity
61%
Feels like
38°F
Dew Point
31°F
8 PM
44°F
10%
9mph
S
Partly Cloudy
Humidity
64%
Feels like
38°F
Dew Point
32°F
9 PM
44°F
10%
10mph
S
Partly Cloudy
Humidity
67%
Feels like
39°F
Dew Point
34°F
10 PM
45°F
10%
10mph
S
Partly Cloudy
Humidity
70%
Feels like
40°F
Dew Point
36°F
11 PM
46°F
10%
10mph
S
Partly Cloudy
Humidity
72%
Feels like
41°F
Dew Point
38°F

Forecast Peak Wind Gusts Today

Clipper System Blasts Central, Eastern U.S. With Winter Impacts

A clipper moving over the Great Lakes brings rain, snow, and high winds through the Atlantic Coastline.

Rainfall and Snowfall Totals Through Friday

Atmospheric River Symptoms Repeat in the Northwest

NOAA, NCDC

White Christmas? What Are The Odds

Friday's Weather Outlook

Friday's Weather Outlook

Friday's Weather Outlook

Weekend Weather Preview

Flu Update Valid For Week Ending December 6, 2025

Weekly Flu Update: Flu Exceeds Annual Baseline

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide