Hourly Weather Forecast - O'Fallon, MO

6 AM
26°F
0%
2mph
WNW
Partly Cloudy
Humidity
78%
Feels like
26°F
Dew Point
21°F
7 AM
28°F
0%
1mph
W
Partly Cloudy
Humidity
76%
Feels like
28°F
Dew Point
21°F
7:11 AM
8 AM
29°F
0%
1mph
SW
Mostly Cloudy
Humidity
72%
Feels like
29°F
Dew Point
21°F
9 AM
31°F
10%
2mph
SSW
Mostly Cloudy
Humidity
68%
Feels like
31°F
Dew Point
22°F
10 AM
33°F
10%
2mph
S
Cloudy
Humidity
65%
Feels like
33°F
Dew Point
22°F
11 AM
35°F
10%
3mph
S
Cloudy
Humidity
61%
Feels like
32°F
Dew Point
23°F
12 PM
37°F
10%
4mph
S
Cloudy
Humidity
58%
Feels like
34°F
Dew Point
24°F
1 PM
38°F
10%
4mph
SSE
Cloudy
Humidity
56%
Feels like
35°F
Dew Point
24°F
2 PM
39°F
10%
6mph
SE
Mostly Cloudy
Humidity
56%
Feels like
35°F
Dew Point
25°F
3 PM
39°F
10%
7mph
ESE
Cloudy
Humidity
59%
Feels like
33°F
Dew Point
25°F
4 PM
38°F
10%
8mph
ESE
Cloudy
Humidity
62%
Feels like
32°F
Dew Point
26°F
4:41 PM
5 PM
38°F
10%
8mph
ESE
Cloudy
Humidity
65%
Feels like
32°F
Dew Point
27°F
6 PM
38°F
10%
8mph
ESE
Cloudy
Humidity
66%
Feels like
33°F
Dew Point
28°F
7 PM
39°F
10%
8mph
ESE
Mostly Cloudy
Humidity
67%
Feels like
33°F
Dew Point
29°F
8 PM
39°F
10%
7mph
SE
Mostly Cloudy
Humidity
67%
Feels like
34°F
Dew Point
29°F
9 PM
40°F
0%
6mph
SE
Mostly Cloudy
Humidity
68%
Feels like
35°F
Dew Point
30°F
10 PM
39°F
0%
6mph
ESE
Cloudy
Humidity
70%
Feels like
35°F
Dew Point
30°F
11 PM
38°F
0%
5mph
E
Cloudy
Humidity
73%
Feels like
34°F
Dew Point
30°F

Snowfall forecast through Saturday A.M.

More Snow Across the Northern U.S. into the Midwest

The parade of snow will continue across the northern U.S. and Midwest through the end of the week.

Rainfall Forecast for Northwest through Friday A.M.

Rains Finally Easing Across the Northwest

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