Hourly Weather Forecast - O'Fallon, MO

12 AM
35°F
10%
5mph
SE
Mostly Cloudy
Humidity
66%
Feels like
30°F
Dew Point
25°F
1 AM
34°F
10%
5mph
SE
Mostly Cloudy
Humidity
67%
Feels like
30°F
Dew Point
25°F
2 AM
34°F
10%
5mph
SE
Mostly Cloudy
Humidity
68%
Feels like
29°F
Dew Point
24°F
3 AM
33°F
10%
5mph
SE
Mostly Cloudy
Humidity
69%
Feels like
28°F
Dew Point
24°F
4 AM
33°F
10%
5mph
SE
Partly Cloudy
Humidity
69%
Feels like
28°F
Dew Point
24°F
5 AM
32°F
10%
5mph
SE
Partly Cloudy
Humidity
71%
Feels like
27°F
Dew Point
23°F
6 AM
31°F
10%
5mph
SE
Partly Cloudy
Humidity
71%
Feels like
26°F
Dew Point
23°F
7 AM
32°F
10%
6mph
SE
Partly Cloudy
Humidity
69%
Feels like
27°F
Dew Point
23°F
7:18 AM
8 AM
35°F
10%
6mph
SE
Mostly Cloudy
Humidity
66%
Feels like
29°F
Dew Point
24°F
9 AM
37°F
10%
6mph
SE
Cloudy
Humidity
61%
Feels like
32°F
Dew Point
25°F
10 AM
40°F
10%
6mph
SE
Cloudy
Humidity
58%
Feels like
35°F
Dew Point
26°F
11 AM
42°F
10%
6mph
SE
Cloudy
Humidity
56%
Feels like
39°F
Dew Point
28°F
12 PM
45°F
10%
6mph
SE
Cloudy
Humidity
57%
Feels like
41°F
Dew Point
30°F
1 PM
47°F
10%
6mph
SE
Mostly Cloudy
Humidity
57%
Feels like
43°F
Dew Point
32°F
2 PM
47°F
10%
7mph
SE
Mostly Cloudy
Humidity
60%
Feels like
44°F
Dew Point
34°F
3 PM
47°F
10%
7mph
SE
Partly Cloudy
Humidity
64%
Feels like
44°F
Dew Point
36°F
4 PM
47°F
10%
6mph
SE
Partly Cloudy
Humidity
67%
Feels like
43°F
Dew Point
36°F
4:44 PM
5 PM
45°F
10%
6mph
SE
Partly Cloudy
Humidity
71%
Feels like
42°F
Dew Point
36°F
6 PM
44°F
10%
5mph
SE
Partly Cloudy
Humidity
77%
Feels like
40°F
Dew Point
37°F
7 PM
43°F
10%
5mph
SE
Partly Cloudy
Humidity
74%
Feels like
39°F
Dew Point
35°F
8 PM
43°F
10%
5mph
SSE
Partly Cloudy
Humidity
78%
Feels like
40°F
Dew Point
36°F
9 PM
43°F
10%
5mph
SSE
Partly Cloudy
Humidity
81%
Feels like
40°F
Dew Point
38°F
10 PM
44°F
10%
5mph
SSE
Partly Cloudy
Humidity
84%
Feels like
41°F
Dew Point
39°F
11 PM
44°F
10%
5mph
S
Partly Cloudy
Humidity
86%
Feels like
41°F
Dew Point
40°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide