Hourly Weather Forecast - O'Fallon, MO

12 AM
31°F
0%
7mph
NW
Mostly Cloudy
Humidity
73%
Feels like
24°F
Dew Point
23°F
1 AM
30°F
0%
6mph
NW
Mostly Cloudy
Humidity
74%
Feels like
24°F
Dew Point
23°F
2 AM
29°F
0%
5mph
NW
Mostly Cloudy
Humidity
74%
Feels like
23°F
Dew Point
22°F
3 AM
29°F
0%
4mph
NW
Partly Cloudy
Humidity
74%
Feels like
24°F
Dew Point
22°F
4 AM
28°F
0%
4mph
NW
Partly Cloudy
Humidity
74%
Feels like
24°F
Dew Point
21°F
5 AM
28°F
0%
3mph
NNW
Mostly Cloudy
Humidity
74%
Feels like
28°F
Dew Point
21°F
6 AM
28°F
0%
2mph
NNW
Mostly Cloudy
Humidity
74%
Feels like
28°F
Dew Point
21°F
7 AM
29°F
0%
1mph
N
Mostly Cloudy
Humidity
72%
Feels like
29°F
Dew Point
21°F
7:11 AM
8 AM
30°F
0%
1mph
ESE
Mostly Cloudy
Humidity
71%
Feels like
30°F
Dew Point
22°F
9 AM
32°F
0%
2mph
SE
Mostly Cloudy
Humidity
68%
Feels like
32°F
Dew Point
23°F
10 AM
34°F
0%
3mph
SSE
Mostly Cloudy
Humidity
65%
Feels like
34°F
Dew Point
23°F
11 AM
36°F
0%
4mph
S
Mostly Cloudy
Humidity
61%
Feels like
33°F
Dew Point
24°F
12 PM
38°F
0%
4mph
S
Cloudy
Humidity
57%
Feels like
34°F
Dew Point
24°F
1 PM
39°F
0%
5mph
SSE
Mostly Cloudy
Humidity
54%
Feels like
36°F
Dew Point
24°F
2 PM
40°F
0%
6mph
SSE
Mostly Cloudy
Humidity
54%
Feels like
36°F
Dew Point
25°F
3 PM
40°F
0%
6mph
SE
Mostly Cloudy
Humidity
55%
Feels like
35°F
Dew Point
25°F
4 PM
39°F
0%
6mph
SE
Mostly Cloudy
Humidity
58%
Feels like
34°F
Dew Point
25°F
4:41 PM
5 PM
38°F
10%
6mph
SE
Mostly Cloudy
Humidity
61%
Feels like
33°F
Dew Point
26°F
6 PM
38°F
10%
6mph
SE
Mostly Cloudy
Humidity
63%
Feels like
33°F
Dew Point
26°F
7 PM
38°F
10%
6mph
SE
Mostly Cloudy
Humidity
65%
Feels like
33°F
Dew Point
27°F
8 PM
37°F
10%
7mph
SE
Mostly Cloudy
Humidity
65%
Feels like
32°F
Dew Point
27°F
9 PM
37°F
10%
6mph
SE
Mostly Cloudy
Humidity
68%
Feels like
32°F
Dew Point
28°F
10 PM
37°F
10%
6mph
SSE
Mostly Cloudy
Humidity
70%
Feels like
32°F
Dew Point
28°F
11 PM
37°F
10%
6mph
SSE
Mostly Cloudy
Humidity
72%
Feels like
32°F
Dew Point
29°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