National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Fair

40°F

4°C

Humidity 83%
Wind Speed NA
Barometer 29.96 in (1014.7 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 21 Mar 2:52 am CDT
Extended Forecast for

Lake Forest IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 37. East wind around 5 mph.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75. East southeast wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 40. Southwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.

    Low: 40 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 40 percent chance of rain, mainly before 4pm. Patchy fog before 4pm. Otherwise, mostly cloudy, with a high near 40. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 40 °F

    Chance Rain
    and Patchy
    Fog

  • Sunday Night

    Sunday Night: A 10 percent chance of rain before 7pm. Mostly cloudy, with a low around 29. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 29 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 37. East wind around 5 mph.
Saturday
Mostly sunny, with a high near 75. East southeast wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
Increasing clouds, with a low around 40. Southwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Sunday
A 40 percent chance of rain, mainly before 4pm. Patchy fog before 4pm. Otherwise, mostly cloudy, with a high near 40. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 10 percent chance of rain before 7pm. Mostly cloudy, with a low around 29. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Mostly cloudy, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
A chance of showers. Mostly cloudy, with a high near 59.
Thursday Night
Mostly cloudy, with a low around 31.
Friday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Forest IL
 42.24°N 87.86°W
Last Update:
3:11 am CDT Mar 21, 2026
Forecast Valid:
3am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation