Hourly Weather Forecast - O'Fallon, IL

12 AM
16°F
0%
6mph
E
Clear
Humidity
67%
Feels like
6°F
Dew Point
7°F
1 AM
15°F
0%
6mph
ESE
Clear
Humidity
71%
Feels like
5°F
Dew Point
7°F
2 AM
14°F
0%
6mph
ESE
Clear
Humidity
72%
Feels like
5°F
Dew Point
7°F
3 AM
14°F
10%
6mph
ESE
Clear
Humidity
73%
Feels like
5°F
Dew Point
7°F
4 AM
14°F
10%
6mph
SE
Partly Cloudy
Humidity
72%
Feels like
5°F
Dew Point
7°F
5 AM
15°F
10%
6mph
SE
Mostly Cloudy
Humidity
73%
Feels like
5°F
Dew Point
8°F
6 AM
16°F
10%
6mph
SE
Cloudy
Humidity
72%
Feels like
7°F
Dew Point
8°F
7 AM
18°F
10%
7mph
SE
Cloudy
Humidity
68%
Feels like
9°F
Dew Point
9°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