Hourly Weather Forecast - O'Fallon, MO

12 AM
16°F
10%
4mph
ESE
Clear
Humidity
58%
Feels like
9°F
Dew Point
4°F
1 AM
16°F
10%
5mph
ESE
Clear
Humidity
60%
Feels like
8°F
Dew Point
4°F
2 AM
15°F
10%
4mph
SE
Clear
Humidity
61%
Feels like
8°F
Dew Point
4°F
3 AM
16°F
10%
4mph
SE
Clear
Humidity
62%
Feels like
8°F
Dew Point
5°F
4 AM
16°F
10%
4mph
SE
Clear
Humidity
61%
Feels like
9°F
Dew Point
5°F
5 AM
16°F
10%
5mph
SE
Clear
Humidity
62%
Feels like
9°F
Dew Point
6°F
6 AM
17°F
10%
5mph
SSE
Clear
Humidity
61%
Feels like
10°F
Dew Point
6°F
7 AM
19°F
10%
6mph
SSE
Partly Cloudy
Humidity
59%
Feels like
11°F
Dew Point
8°F
7:14 AM
8 AM
22°F
10%
6mph
SSE
Mostly Cloudy
Humidity
57%
Feels like
14°F
Dew Point
9°F
9 AM
25°F
10%
7mph
SSE
Cloudy
Humidity
52%
Feels like
17°F
Dew Point
10°F
10 AM
28°F
10%
7mph
S
Cloudy
Humidity
49%
Feels like
20°F
Dew Point
11°F
11 AM
31°F
10%
7mph
S
Cloudy
Humidity
46%
Feels like
24°F
Dew Point
12°F
12 PM
33°F
10%
7mph
S
Mostly Cloudy
Humidity
44%
Feels like
27°F
Dew Point
14°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