Hourly Weather Forecast - O'Fallon, IL

12 AM
29°F
0%
15mph
SSW
Cloudy
Humidity
50%
Feels like
18°F
Dew Point
13°F
1 AM
29°F
0%
14mph
SSW
Cloudy
Humidity
51%
Feels like
19°F
Dew Point
13°F
2 AM
30°F
0%
14mph
SSW
Cloudy
Humidity
51%
Feels like
20°F
Dew Point
14°F
3 AM
31°F
0%
13mph
SSW
Cloudy
Humidity
53%
Feels like
20°F
Dew Point
15°F
4 AM
31°F
0%
13mph
SW
Mostly Cloudy
Humidity
54%
Feels like
21°F
Dew Point
17°F
5 AM
32°F
0%
13mph
SW
Partly Cloudy
Humidity
56%
Feels like
22°F
Dew Point
18°F
6 AM
33°F
0%
13mph
SW
Partly Cloudy
Humidity
58%
Feels like
24°F
Dew Point
20°F
7 AM
35°F
0%
13mph
WSW
Mostly Clear
Humidity
58%
Feels like
26°F
Dew Point
22°F
7:13 AM
8 AM
37°F
0%
13mph
WSW
Sunny
Humidity
57%
Feels like
29°F
Dew Point
24°F
9 AM
40°F
0%
13mph
WSW
Sunny
Humidity
55%
Feels like
33°F
Dew Point
25°F
10 AM
43°F
0%
13mph
WSW
Sunny
Humidity
52%
Feels like
36°F
Dew Point
26°F
11 AM
45°F
0%
14mph
W
Sunny
Humidity
49%
Feels like
38°F
Dew Point
26°F
12 PM
46°F
0%
14mph
W
Sunny
Humidity
46%
Feels like
39°F
Dew Point
26°F
1 PM
46°F
10%
14mph
W
Sunny
Humidity
45%
Feels like
39°F
Dew Point
25°F
2 PM
44°F
10%
13mph
W
Sunny
Humidity
45%
Feels like
38°F
Dew Point
24°F
3 PM
42°F
10%
13mph
W
Sunny
Humidity
46%
Feels like
36°F
Dew Point
23°F
4 PM
40°F
10%
12mph
W
Sunny
Humidity
49%
Feels like
33°F
Dew Point
22°F
5 PM
37°F
10%
10mph
W
Sunny
Humidity
53%
Feels like
30°F
Dew Point
22°F
5:09 PM
6 PM
35°F
10%
9mph
W
Clear
Humidity
58%
Feels like
28°F
Dew Point
22°F
7 PM
33°F
10%
7mph
WNW
Clear
Humidity
63%
Feels like
27°F
Dew Point
22°F
8 PM
31°F
10%
6mph
NW
Clear
Humidity
68%
Feels like
25°F
Dew Point
22°F
9 PM
30°F
20%
6mph
NW
Clear
Humidity
72%
Feels like
24°F
Dew Point
22°F
10 PM
28°F
20%
6mph
NW
Mostly Clear
Humidity
76%
Feels like
22°F
Dew Point
22°F
11 PM
27°F
20%
6mph
NW
Partly Cloudy
Humidity
79%
Feels like
21°F
Dew Point
21°F

Snow Forecast through Saturday

Multiple Snowy Systems Hit Great Lakes, Northeast

As one disturbance exits New England tonight, another will be quick on its heels in the Great Lakes on Friday.

Friday's Weather Outlook

Friday's Weather Outlook

Weekend Weather Preview

Weekend Weather Preview

Weekly Drought Map for January 15, 2026

Active Weather Creates Mix of Improvements, Degradations to Drought Depiction

(Image provided by NOAA)

Polar Vortex: What Is It?

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

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