Hourly Weather Forecast - Illiopolis, IL

12 AM
29°F
10%
6mph
SE
Cloudy
Humidity
69%
Feels like
23°F
Dew Point
21°F
1 AM
29°F
20%
6mph
SE
Cloudy
Humidity
68%
Feels like
23°F
Dew Point
20°F
2 AM
29°F
20%
7mph
SE
Mostly Cloudy
Humidity
67%
Feels like
23°F
Dew Point
20°F
3 AM
29°F
20%
7mph
SE
Mostly Cloudy
Humidity
66%
Feels like
22°F
Dew Point
20°F
4 AM
29°F
20%
8mph
SE
Mostly Cloudy
Humidity
66%
Feels like
22°F
Dew Point
20°F
5 AM
29°F
30%
8mph
SE
30 % Chance of Heavy Snow
Humidity
66%
Feels like
21°F
Dew Point
19°F
6 AM
29°F
30%
8mph
SE
30% Chance Frozen Mix
Humidity
66%
Feels like
21°F
Dew Point
19°F
7 AM
30°F
30%
9mph
SE
30% Chance Frozen Mix
Humidity
66%
Feels like
22°F
Dew Point
20°F
7:15 AM
8 AM
31°F
20%
9mph
SE
Partly Cloudy
Humidity
65%
Feels like
23°F
Dew Point
21°F
9 AM
33°F
20%
10mph
SE
Mostly Cloudy
Humidity
63%
Feels like
25°F
Dew Point
22°F
10 AM
35°F
10%
10mph
SE
Mostly Cloudy
Humidity
61%
Feels like
27°F
Dew Point
22°F
11 AM
37°F
10%
11mph
SE
Partly Cloudy
Humidity
58%
Feels like
29°F
Dew Point
23°F
12 PM
38°F
10%
11mph
SSE
Partly Cloudy
Humidity
56%
Feels like
31°F
Dew Point
24°F
1 PM
40°F
10%
11mph
SSE
Partly Cloudy
Humidity
56%
Feels like
33°F
Dew Point
25°F
2 PM
41°F
10%
10mph
SSE
Partly Cloudy
Humidity
57%
Feels like
34°F
Dew Point
27°F
3 PM
41°F
10%
10mph
SSE
Partly Cloudy
Humidity
59%
Feels like
35°F
Dew Point
28°F
4 PM
40°F
10%
10mph
SSE
Partly Cloudy
Humidity
63%
Feels like
34°F
Dew Point
29°F
4:35 PM
5 PM
40°F
10%
9mph
SSE
Partly Cloudy
Humidity
68%
Feels like
33°F
Dew Point
30°F
6 PM
39°F
10%
9mph
SSE
Mostly Cloudy
Humidity
72%
Feels like
33°F
Dew Point
31°F
7 PM
38°F
10%
9mph
SSE
Mostly Cloudy
Humidity
76%
Feels like
32°F
Dew Point
31°F
8 PM
38°F
10%
9mph
SSE
Partly Cloudy
Humidity
79%
Feels like
32°F
Dew Point
32°F
9 PM
38°F
10%
9mph
SSE
Partly Cloudy
Humidity
82%
Feels like
31°F
Dew Point
33°F
10 PM
38°F
10%
9mph
SSE
Partly Cloudy
Humidity
85%
Feels like
32°F
Dew Point
34°F
11 PM
38°F
10%
9mph
S
Partly Cloudy
Humidity
87%
Feels like
32°F
Dew Point
35°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

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

Wednesday's Weather Outlook

Today's Weather Outlook

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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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