Hourly Weather Forecast - O'Fallon, MO

12 AM
21°F
10%
8mph
N
Mostly Cloudy
Humidity
63%
Feels like
11°F
Dew Point
10°F
1 AM
20°F
10%
9mph
N
Mostly Cloudy
Humidity
63%
Feels like
9°F
Dew Point
9°F
2 AM
18°F
10%
9mph
NNW
Partly Cloudy
Humidity
64%
Feels like
7°F
Dew Point
8°F
3 AM
17°F
10%
9mph
NNW
Partly Cloudy
Humidity
67%
Feels like
5°F
Dew Point
7°F
4 AM
15°F
10%
9mph
NNW
Mostly Clear
Humidity
65%
Feels like
3°F
Dew Point
5°F
5 AM
13°F
10%
9mph
NNW
Mostly Clear
Humidity
66%
Feels like
1°F
Dew Point
4°F
6 AM
11°F
10%
9mph
NNW
Clear
Humidity
65%
Feels like
-1°F
Dew Point
2°F
7 AM
11°F
10%
8mph
N
Clear
Humidity
63%
Feels like
-1°F
Dew Point
1°F
7:13 AM
8 AM
12°F
0%
8mph
N
Sunny
Humidity
60%
Feels like
1°F
Dew Point
1°F
9 AM
14°F
0%
8mph
N
Sunny
Humidity
54%
Feels like
4°F
Dew Point
1°F
10 AM
17°F
0%
7mph
N
Sunny
Humidity
48%
Feels like
7°F
Dew Point
1°F
11 AM
19°F
0%
7mph
N
Sunny
Humidity
44%
Feels like
10°F
Dew Point
1°F
12 PM
21°F
0%
7mph
N
Sunny
Humidity
40%
Feels like
12°F
Dew Point
1°F
1 PM
23°F
0%
7mph
N
Sunny
Humidity
36%
Feels like
14°F
Dew Point
0°F
2 PM
24°F
0%
7mph
N
Sunny
Humidity
36%
Feels like
16°F
Dew Point
0°F
3 PM
23°F
0%
6mph
NNE
Sunny
Humidity
36%
Feels like
15°F
Dew Point
0°F
4 PM
22°F
0%
6mph
NNE
Sunny
Humidity
38%
Feels like
14°F
Dew Point
0°F
4:41 PM
5 PM
20°F
0%
5mph
NE
Clear
Humidity
40%
Feels like
13°F
Dew Point
0°F
6 PM
19°F
0%
5mph
NE
Clear
Humidity
43%
Feels like
12°F
Dew Point
1°F
7 PM
19°F
0%
4mph
ENE
Clear
Humidity
53%
Feels like
12°F
Dew Point
5°F
8 PM
19°F
0%
4mph
ENE
Clear
Humidity
53%
Feels like
12°F
Dew Point
5°F
9 PM
18°F
10%
4mph
E
Clear
Humidity
55%
Feels like
12°F
Dew Point
5°F
10 PM
18°F
10%
4mph
E
Clear
Humidity
58%
Feels like
11°F
Dew Point
5°F
11 PM
17°F
10%
4mph
E
Clear
Humidity
60%
Feels like
10°F
Dew Point
6°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