Hourly Weather Forecast - O'Fallon, IL

11 AM
66°F
10%
5mph
S
Partly Cloudy
Humidity
47%
Feels like
66°F
Dew Point
46°F
12 PM
70°F
10%
6mph
S
Partly Cloudy
Humidity
43%
Feels like
70°F
Dew Point
46°F
1 PM
74°F
0%
6mph
S
Partly Cloudy
Humidity
38%
Feels like
74°F
Dew Point
47°F
2 PM
76°F
0%
7mph
S
Mostly Sunny
Humidity
36%
Feels like
76°F
Dew Point
47°F
3 PM
78°F
0%
7mph
S
Sunny
Humidity
34%
Feels like
78°F
Dew Point
47°F
4 PM
77°F
0%
7mph
S
Sunny
Humidity
34%
Feels like
77°F
Dew Point
47°F
5 PM
75°F
0%
8mph
S
Sunny
Humidity
37%
Feels like
75°F
Dew Point
47°F
6 PM
71°F
0%
7mph
S
Sunny
Humidity
42%
Feels like
71°F
Dew Point
47°F
7 PM
68°F
0%
7mph
SSE
Sunny
Humidity
48%
Feels like
68°F
Dew Point
47°F
7:10 PM
8 PM
65°F
0%
7mph
SSE
Clear
Humidity
53%
Feels like
65°F
Dew Point
47°F
9 PM
62°F
0%
7mph
S
Clear
Humidity
58%
Feels like
62°F
Dew Point
47°F
10 PM
60°F
0%
7mph
S
Mostly Clear
Humidity
62%
Feels like
60°F
Dew Point
47°F
11 PM
58°F
0%
7mph
S
Clear
Humidity
67%
Feels like
58°F
Dew Point
47°F

Today's High Temperature Outlook

Summer-Like Heat Scorches the Southwest

The calendar may stay it's only March, but it will feel like Summer across the Southwest over the next several days.

Today's Weather Outlook

Today's Weather Outlook

Story image: WeatherBug user Pat S. captures a plant blooming in Columbia, Md., on February 24, 2017.

When Does Spring Begin?

(Image provided by Pixabay.com)

Lightning Safety

A tree knocked over after a storm produced high winds. (provided by PublicDomainPictures via Pixabay.com)

Strong Winds in the Springtime

Weekly Drought Map for March 12, 2026

Widespread Drought Improvement For The South, Midwest

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