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Lake Forest, Illinois Weather Forecast
Lake Forest, Illinois Weather
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Weather Forecast for Lake Forest, Illinois : Lake County
Issued: 3:11 am CST Dec 21, 2025 Latitude: 42.2586342 Longitude: -87.840625 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Christmas Day Friday Saturday
Clear on Overnight Sunny on Sunday Cloudy on Monday Partly Sunny on Tuesday 20% chance of rain on Wednesday Cloudy on Christmas Day Mostly Cloudy on Friday Mostly Cloudy on Saturday
Low: 19°F High: 29°F High: 41°F High: 45°F High: 41°F High: 45°F High: 41°F High: 41°F
Low: 24 °F Low: 36°F Low: 33°F Low: 40°F Low: 37°F Low: 32°F  
Clear Sunny Cloudy Partly Sunny Rain Cloudy Mostly Cloudy Mostly Cloudy
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Current Conditions at
WAUKEGAN - (KUGN)
19°
Clear
as of 2:51 AM CST
Rel. Humidity: 52%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.25 in.
Flight Rule: VFR
Wind Data
7 MPH
Gust: 18 MPH
310° Northwest
Cloud Level(s): Clear
Current Conditions at
CHICAGO/WHEELING - (KPWK)
21°
Clear
as of 2:52 AM CST
Rel. Humidity: 57%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.27 in.
Flight Rule: VFR
Wind Data
8 MPH
Gust: 18 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
CHICAGO-OHARE - (KORD)
23°
Feels like 11°F
Clear
as of 2:51 AM CST
Rel. Humidity: 53%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
13 MPH
310° Northwest
Cloud Level(s): Clear
Clear on Overnight Overnight... Clear, with a steady temperature around 19. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunny on Sunday Sunday... Sunny, with a high near 29. Northwest wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.
Increasing Clouds on Sunday Night Sunday Night... Increasing clouds, with a temperature falling to near 24 by 8pm, then rising to around 29 during the remainder of the night. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Cloudy on Monday Monday... Cloudy, with a high near 41. South wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 36. South southwest wind around 10 mph.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 45.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 33.
20% chance of rain Wednesday Wednesday... A chance of showers or drizzle after noon. Cloudy, with a high near 41.
Rain on Wednesday Night Wednesday Night... Showers or drizzle likely before midnight. Cloudy, with a low around 40.
Cloudy on Christmas Day Christmas Day... Cloudy, with a high near 45.
Cloudy on Thursday Night Thursday Night... Cloudy, with a low around 37.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 41.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 32.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 41.
Sun Almanac for Lake Forest, Illinois
Sunrise: 07:17 AM
Sunset: 4:22 PM
Civil Sunrise:06:45 AM
Civil Sunset: 4:54 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:30 PM
Astro Sunrise: 05:36 AM
Astro Sunset: 6:04 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.