Hourly Weather Forecast - O'Fallon, MO

12 AM
37°F
10%
5mph
S
Mostly Cloudy
Humidity
74%
Feels like
32°F
Dew Point
29°F
1 AM
37°F
0%
5mph
S
Mostly Cloudy
Humidity
76%
Feels like
33°F
Dew Point
30°F
2 AM
36°F
0%
4mph
SSW
Mostly Cloudy
Humidity
79%
Feels like
32°F
Dew Point
30°F
3 AM
36°F
0%
4mph
SW
Mostly Cloudy
Humidity
82%
Feels like
32°F
Dew Point
31°F
4 AM
35°F
0%
3mph
WSW
Mostly Cloudy
Humidity
84%
Feels like
33°F
Dew Point
31°F
5 AM
35°F
0%
3mph
WNW
Cloudy
Humidity
85%
Feels like
33°F
Dew Point
31°F
6 AM
35°F
0%
4mph
NW
Mostly Cloudy
Humidity
85%
Feels like
32°F
Dew Point
31°F
7 AM
36°F
0%
6mph
NW
Mostly Cloudy
Humidity
85%
Feels like
31°F
Dew Point
32°F
7:11 AM
8 AM
37°F
0%
6mph
NNW
Mostly Cloudy
Humidity
82%
Feels like
32°F
Dew Point
33°F
9 AM
39°F
0%
7mph
NNW
Partly Cloudy
Humidity
78%
Feels like
34°F
Dew Point
33°F
10 AM
40°F
10%
8mph
NNW
Partly Cloudy
Humidity
74%
Feels like
35°F
Dew Point
33°F
11 AM
42°F
10%
9mph
NW
Partly Cloudy
Humidity
71%
Feels like
37°F
Dew Point
33°F
12 PM
43°F
0%
9mph
NW
Partly Cloudy
Humidity
67%
Feels like
37°F
Dew Point
33°F
1 PM
43°F
0%
11mph
NW
Partly Cloudy
Humidity
66%
Feels like
37°F
Dew Point
32°F
2 PM
42°F
0%
11mph
NW
Partly Cloudy
Humidity
66%
Feels like
36°F
Dew Point
32°F
3 PM
41°F
0%
11mph
NW
Partly Cloudy
Humidity
67%
Feels like
34°F
Dew Point
31°F
4 PM
39°F
0%
10mph
NW
Partly Cloudy
Humidity
68%
Feels like
33°F
Dew Point
29°F
4:41 PM
5 PM
38°F
0%
9mph
NW
Partly Cloudy
Humidity
71%
Feels like
31°F
Dew Point
29°F
6 PM
36°F
0%
8mph
NNW
Partly Cloudy
Humidity
72%
Feels like
30°F
Dew Point
28°F
7 PM
35°F
0%
8mph
NNW
Partly Cloudy
Humidity
73%
Feels like
29°F
Dew Point
27°F
8 PM
34°F
0%
8mph
NNW
Partly Cloudy
Humidity
73%
Feels like
27°F
Dew Point
26°F
9 PM
33°F
0%
8mph
NNW
Partly Cloudy
Humidity
75%
Feels like
26°F
Dew Point
26°F
10 PM
31°F
0%
7mph
NNW
Partly Cloudy
Humidity
75%
Feels like
25°F
Dew Point
25°F
11 PM
30°F
0%
7mph
NNW
Partly Cloudy
Humidity
75%
Feels like
23°F
Dew Point
23°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