Hourly Weather Forecast - Sullivan, IL

12 AM
19°F
10%
6mph
SSW
Cloudy
Humidity
87%
Feels like
11°F
Dew Point
16°F
1 AM
19°F
10%
5mph
SSW
Cloudy
Humidity
89%
Feels like
11°F
Dew Point
16°F
2 AM
19°F
20%
5mph
SSW
Cloudy
Humidity
91%
Feels like
11°F
Dew Point
17°F
3 AM
19°F
10%
5mph
SSW
Cloudy
Humidity
91%
Feels like
11°F
Dew Point
17°F
4 AM
19°F
10%
5mph
SSW
Cloudy
Humidity
90%
Feels like
11°F
Dew Point
16°F
5 AM
18°F
10%
5mph
SSW
Cloudy
Humidity
93%
Feels like
11°F
Dew Point
17°F
6 AM
19°F
10%
5mph
S
Cloudy
Humidity
96%
Feels like
11°F
Dew Point
18°F
7 AM
20°F
10%
6mph
S
Mostly Cloudy
Humidity
95%
Feels like
12°F
Dew Point
19°F
7:08 AM
8 AM
22°F
10%
6mph
S
Mostly Cloudy
Humidity
95%
Feels like
14°F
Dew Point
20°F
9 AM
24°F
10%
6mph
S
Partly Cloudy
Humidity
95%
Feels like
16°F
Dew Point
22°F
10 AM
26°F
10%
6mph
S
Partly Cloudy
Humidity
91%
Feels like
19°F
Dew Point
24°F
11 AM
28°F
10%
7mph
S
Mostly Cloudy
Humidity
88%
Feels like
21°F
Dew Point
25°F
12 PM
30°F
10%
7mph
S
Mostly Cloudy
Humidity
87%
Feels like
23°F
Dew Point
27°F
1 PM
32°F
10%
7mph
S
Mostly Cloudy
Humidity
86%
Feels like
25°F
Dew Point
28°F
2 PM
32°F
10%
8mph
S
Mostly Cloudy
Humidity
85%
Feels like
26°F
Dew Point
28°F
3 PM
33°F
10%
8mph
S
Mostly Cloudy
Humidity
85%
Feels like
26°F
Dew Point
29°F
4 PM
32°F
10%
8mph
SSE
Mostly Cloudy
Humidity
86%
Feels like
25°F
Dew Point
29°F
4:31 PM
5 PM
31°F
10%
9mph
SSE
Partly Cloudy
Humidity
89%
Feels like
24°F
Dew Point
28°F
6 PM
31°F
10%
9mph
S
Mostly Cloudy
Humidity
92%
Feels like
22°F
Dew Point
28°F
7 PM
31°F
10%
9mph
S
Mostly Cloudy
Humidity
92%
Feels like
22°F
Dew Point
29°F

Snow and ice forecast through Friday A.M.

Multiple Snow Threats Across the Northern U.S.

Multiple systems will bring snow across the Northern U.S. through the end of the week.

Rainfall Forecast for Northwest through Friday A.M.

Unrelenting Rains Soak the Northwest

Thursday's Weather Outlook

Thursday'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