Hourly Weather Forecast - O'Fallon, IL

12 AM
26°F
20%
6mph
NW
Mostly Cloudy
Humidity
82%
Feels like
19°F
Dew Point
21°F
1 AM
24°F
20%
6mph
NW
Mostly Cloudy
Humidity
85%
Feels like
17°F
Dew Point
20°F
2 AM
23°F
20%
5mph
WNW
Mostly Cloudy
Humidity
87%
Feels like
17°F
Dew Point
20°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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