Hourly Weather Forecast - Illiopolis, IL

12 AM
31°F
0%
16mph
S
Clear
Humidity
66%
Feels like
20°F
Dew Point
21°F
1 AM
31°F
0%
16mph
S
Clear
Humidity
66%
Feels like
20°F
Dew Point
21°F
2 AM
32°F
0%
17mph
S
Mostly Clear
Humidity
67%
Feels like
21°F
Dew Point
22°F
3 AM
32°F
0%
17mph
S
Mostly Clear
Humidity
67%
Feels like
21°F
Dew Point
22°F
4 AM
33°F
0%
17mph
S
Partly Cloudy
Humidity
68%
Feels like
22°F
Dew Point
23°F
5 AM
33°F
0%
17mph
S
Mostly Cloudy
Humidity
68%
Feels like
22°F
Dew Point
24°F
6 AM
34°F
0%
17mph
S
Cloudy
Humidity
69%
Feels like
23°F
Dew Point
25°F
7 AM
35°F
0%
17mph
S
Cloudy
Humidity
70%
Feels like
24°F
Dew Point
26°F
7:14 AM
8 AM
35°F
0%
17mph
S
Cloudy
Humidity
70%
Feels like
25°F
Dew Point
27°F
9 AM
37°F
0%
16mph
S
Cloudy
Humidity
70%
Feels like
27°F
Dew Point
28°F
10 AM
39°F
0%
16mph
SSW
Cloudy
Humidity
69%
Feels like
30°F
Dew Point
29°F
11 AM
41°F
0%
15mph
SSW
Cloudy
Humidity
67%
Feels like
34°F
Dew Point
31°F
12 PM
43°F
0%
14mph
SSW
Cloudy
Humidity
66%
Feels like
36°F
Dew Point
33°F
1 PM
44°F
0%
13mph
SW
Cloudy
Humidity
66%
Feels like
38°F
Dew Point
34°F
2 PM
45°F
0%
13mph
WSW
Mostly Cloudy
Humidity
66%
Feels like
38°F
Dew Point
34°F
3 PM
44°F
0%
13mph
WSW
Mostly Cloudy
Humidity
68%
Feels like
38°F
Dew Point
34°F
4 PM
42°F
0%
12mph
W
Mostly Cloudy
Humidity
72%
Feels like
36°F
Dew Point
34°F
4:34 PM
5 PM
39°F
0%
11mph
WNW
Cloudy
Humidity
78%
Feels like
32°F
Dew Point
33°F
6 PM
37°F
10%
11mph
WNW
Cloudy
Humidity
81%
Feels like
30°F
Dew Point
32°F
7 PM
36°F
10%
11mph
NW
Mostly Cloudy
Humidity
81%
Feels like
28°F
Dew Point
30°F
8 PM
34°F
0%
11mph
NW
Partly Cloudy
Humidity
81%
Feels like
26°F
Dew Point
29°F
9 PM
33°F
0%
11mph
NW
Partly Cloudy
Humidity
80%
Feels like
25°F
Dew Point
27°F
10 PM
32°F
0%
10mph
NW
Mostly Clear
Humidity
79%
Feels like
23°F
Dew Point
26°F
11 PM
31°F
0%
9mph
NW
Clear
Humidity
78%
Feels like
23°F
Dew Point
24°F

Rainfall and Snowfall Totals Through Thursday

Flooding Rain, Heavy Snow and Winds Slam Northwest, North-Central U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Thursday's Weather Outlook

Thursday's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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