Hourly Weather Forecast - Lake Forest, IL

12 AM
29°F
10%
2mph
SSW
Cloudy
Humidity
62%
Feels like
29°F
Dew Point
18°F
1 AM
30°F
10%
2mph
SSW
Cloudy
Humidity
61%
Feels like
30°F
Dew Point
19°F
2 AM
31°F
10%
2mph
SSW
Cloudy
Humidity
61%
Feels like
31°F
Dew Point
19°F
3 AM
32°F
10%
2mph
SSW
Cloudy
Humidity
60%
Feels like
32°F
Dew Point
19°F
4 AM
32°F
10%
2mph
SSW
Cloudy
Humidity
60%
Feels like
32°F
Dew Point
19°F
5 AM
32°F
10%
2mph
SSW
Cloudy
Humidity
60%
Feels like
32°F
Dew Point
19°F
6 AM
32°F
10%
2mph
S
Cloudy
Humidity
60%
Feels like
32°F
Dew Point
20°F
7 AM
33°F
10%
2mph
S
Cloudy
Humidity
58%
Feels like
33°F
Dew Point
20°F
7:17 AM
8 AM
34°F
10%
2mph
S
Cloudy
Humidity
55%
Feels like
34°F
Dew Point
20°F
9 AM
36°F
10%
3mph
S
Cloudy
Humidity
52%
Feels like
36°F
Dew Point
20°F
10 AM
37°F
10%
3mph
S
Cloudy
Humidity
50%
Feels like
37°F
Dew Point
20°F
11 AM
39°F
10%
3mph
S
Cloudy
Humidity
48%
Feels like
37°F
Dew Point
21°F
12 PM
40°F
10%
3mph
S
Cloudy
Humidity
48%
Feels like
38°F
Dew Point
22°F
1 PM
40°F
10%
3mph
S
Cloudy
Humidity
49%
Feels like
40°F
Dew Point
23°F
2 PM
40°F
0%
2mph
S
Cloudy
Humidity
50%
Feels like
40°F
Dew Point
23°F
3 PM
39°F
10%
2mph
S
Cloudy
Humidity
53%
Feels like
39°F
Dew Point
24°F
4 PM
39°F
10%
2mph
SSW
Cloudy
Humidity
56%
Feels like
39°F
Dew Point
24°F
4:22 PM
5 PM
38°F
10%
2mph
SSW
Mostly Cloudy
Humidity
62%
Feels like
38°F
Dew Point
26°F
6 PM
37°F
10%
2mph
SSW
Mostly Cloudy
Humidity
68%
Feels like
37°F
Dew Point
28°F
7 PM
37°F
10%
2mph
SSW
Mostly Cloudy
Humidity
72%
Feels like
37°F
Dew Point
28°F
8 PM
37°F
10%
2mph
SSW
Mostly Cloudy
Humidity
74%
Feels like
37°F
Dew Point
29°F
9 PM
37°F
10%
2mph
SSW
Mostly Cloudy
Humidity
76%
Feels like
37°F
Dew Point
30°F
10 PM
38°F
10%
2mph
SW
Partly Cloudy
Humidity
78%
Feels like
38°F
Dew Point
31°F
11 PM
38°F
10%
2mph
SW
Partly Cloudy
Humidity
81%
Feels like
38°F
Dew Point
32°F

Rain And Snow Totals Through Monday

Atmospheric River Impacts Northern California

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

NOAA, NCDC

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Today's Weather Outlook

Today'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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