Hourly Weather Forecast - Sullivan, IL

12 AM
8°F
0%
4mph
E
Clear
Humidity
86%
Feels like
0°F
Dew Point
5°F
1 AM
9°F
10%
4mph
ESE
Clear
Humidity
86%
Feels like
0°F
Dew Point
5°F
2 AM
9°F
10%
4mph
ESE
Clear
Humidity
87%
Feels like
1°F
Dew Point
6°F
3 AM
9°F
10%
4mph
SE
Clear
Humidity
87%
Feels like
1°F
Dew Point
6°F
4 AM
9°F
10%
5mph
SE
Mostly Clear
Humidity
88%
Feels like
1°F
Dew Point
6°F

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

Low pressure will produce a swath of snow from Minnesota to Maine into Thursday.

Rainfall Forecast for Northwest through Thursday

Heavy, Flooding Rain Impacts the Northwest

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