Hourly Weather Forecast - Cortland, IL

12 AM
30°F
0%
5mph
NE
Partly Cloudy
Humidity
91%
Feels like
25°F
Dew Point
28°F
1 AM
29°F
0%
6mph
ENE
Mostly Cloudy
Humidity
89%
Feels like
24°F
Dew Point
27°F
2 AM
29°F
0%
6mph
E
Cloudy
Humidity
89%
Feels like
23°F
Dew Point
26°F
3 AM
29°F
0%
6mph
E
Cloudy
Humidity
89%
Feels like
22°F
Dew Point
26°F
4 AM
29°F
0%
6mph
E
Cloudy
Humidity
90%
Feels like
22°F
Dew Point
26°F
5 AM
29°F
0%
7mph
ESE
Cloudy
Humidity
88%
Feels like
22°F
Dew Point
26°F
6 AM
30°F
0%
8mph
ESE
Cloudy
Humidity
86%
Feels like
23°F
Dew Point
26°F
7 AM
31°F
0%
9mph
ESE
Cloudy
Humidity
85%
Feels like
24°F
Dew Point
28°F
7:20 AM
8 AM
33°F
0%
9mph
ESE
Mostly Cloudy
Humidity
85%
Feels like
25°F
Dew Point
29°F
9 AM
35°F
0%
10mph
SE
Mostly Cloudy
Humidity
83%
Feels like
27°F
Dew Point
30°F
10 AM
37°F
0%
11mph
SE
Partly Cloudy
Humidity
80%
Feels like
30°F
Dew Point
31°F
11 AM
39°F
10%
11mph
SE
Partly Cloudy
Humidity
76%
Feels like
32°F
Dew Point
32°F
12 PM
40°F
30%
11mph
SE
30% Chance Rain Showers
Humidity
74%
Feels like
33°F
Dew Point
32°F
1 PM
40°F
30%
11mph
SSE
30% Chance Rain Showers
Humidity
77%
Feels like
34°F
Dew Point
34°F
2 PM
40°F
30%
11mph
SSE
30% Chance of Light Rain
Humidity
82%
Feels like
34°F
Dew Point
35°F
3 PM
40°F
30%
10mph
SSE
30% Chance of Light Rain
Humidity
87%
Feels like
34°F
Dew Point
36°F
4 PM
40°F
30%
10mph
SSE
30% Chance of Light Rain
Humidity
91%
Feels like
34°F
Dew Point
37°F
4:28 PM
5 PM
40°F
30%
9mph
SSE
30% Chance of Light Rain
Humidity
94%
Feels like
34°F
Dew Point
39°F
6 PM
41°F
30%
9mph
SSE
30% Chance of Light Rain
Humidity
96%
Feels like
35°F
Dew Point
40°F
7 PM
41°F
40%
8mph
SSE
40% Chance of Light Rain
Humidity
97%
Feels like
36°F
Dew Point
41°F
8 PM
42°F
50%
7mph
S
50% Chance of Light Rain
Humidity
98%
Feels like
38°F
Dew Point
42°F
9 PM
43°F
50%
6mph
S
50% Chance of Light Rain
Humidity
98%
Feels like
39°F
Dew Point
42°F
10 PM
44°F
50%
6mph
S
50% Chance of Light Rain
Humidity
98%
Feels like
40°F
Dew Point
43°F
11 PM
44°F
50%
6mph
N
50% Chance of Light Rain
Humidity
99%
Feels like
40°F
Dew Point
44°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Sunday's Weather Outlook

Sunday's Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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