Hourly Weather Forecast - Decatur, IL

11 AM
2°F
0%
10mph
NW
Mostly Sunny
Humidity
65%
Feels like
-13°F
Dew Point
-7°F
12 PM
4°F
0%
10mph
NW
Mostly Sunny
Humidity
62%
Feels like
-11°F
Dew Point
-6°F
1 PM
5°F
0%
9mph
NW
Mostly Sunny
Humidity
61%
Feels like
-10°F
Dew Point
-6°F
2 PM
5°F
0%
9mph
NW
Mostly Sunny
Humidity
61%
Feels like
-10°F
Dew Point
-6°F
3 PM
3°F
0%
9mph
WNW
Mostly Sunny
Humidity
63%
Feels like
-11°F
Dew Point
-6°F
4 PM
1°F
0%
8mph
WNW
Mostly Sunny
Humidity
70%
Feels like
-13°F
Dew Point
-7°F
4:31 PM
5 PM
-2°F
0%
7mph
WNW
Very Cold
Humidity
78%
Feels like
-16°F
Dew Point
-8°F
6 PM
-5°F
0%
6mph
W
Very Cold
Humidity
83%
Feels like
-17°F
Dew Point
-8°F
7 PM
-5°F
0%
5mph
W
Very Cold
Humidity
83%
Feels like
-17°F
Dew Point
-9°F
8 PM
-6°F
0%
5mph
WSW
Very Cold
Humidity
84%
Feels like
-18°F
Dew Point
-9°F
9 PM
-7°F
0%
5mph
SW
Very Cold
Humidity
86%
Feels like
-19°F
Dew Point
-10°F
10 PM
-7°F
0%
6mph
SSW
Very Cold
Humidity
89%
Feels like
-20°F
Dew Point
-10°F
11 PM
-7°F
0%
7mph
S
Very Cold
Humidity
89%
Feels like
-22°F
Dew Point
-10°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

Extreme cold paired with their wind chill values will shiver much of the nation.

Snowfall forecast through Monday evening.

Mid-Atlantic, Great Lakes Snow Piles Up

Sunday Weather Outlook

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

Cold Air Damming - Cause And Effects

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