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

Hazardous Weather Conditions

Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Partly Cloudy

68°F

20°C

Humidity 68%
Wind Speed Calm
Barometer 29.99 in (1015.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 20 Aug 12:52 am CDT
Extended Forecast for

Lake Forest IL

  • Overnight

    Overnight: Mostly cloudy, then gradually becoming mostly clear, with a low around 62. North northeast wind around 5 mph.

    Low: 62 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 77. Northeast wind around 5 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60. East wind around 5 mph becoming calm.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63. Southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 63 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77.

    High: 77 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, then gradually becoming mostly clear, with a low around 62. North northeast wind around 5 mph.
Thursday
Sunny, with a high near 77. Northeast wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 60. East wind around 5 mph becoming calm.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63. Southwest wind around 5 mph, with gusts as high as 10 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Forest IL
 42.21°N 87.89°W
Last Update:
1:21 am CDT Aug 20, 2026
Forecast Valid:
1am CDT Aug 20, 2026-6pm CDT Aug 26, 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