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Monsoons Return to the Southwest U.S.; Potential Atlantic Tropical System Interaction

In Arizona and New Mexico, heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding Thursday into Sunday. The close proximity of Tropical Storm Humberto and a tropical wave (AL94) could lead to interaction between them, and details of their long-range track and intensity forecasts, and any potential impacts, are more uncertain than usual. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Fair

60°F

16°C

Humidity 93%
Wind Speed N 3 mph
Barometer 29.99 in (1015.4 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 24 Sep 11:52 pm CDT
Extended Forecast for

Lake Forest IL

  • Overnight

    Overnight: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 56. North northwest wind 5 to 10 mph.

    Low: 56 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 72. North wind around 10 mph, with gusts as high as 15 mph.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. West wind around 5 mph.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79. West southwest wind around 5 mph.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. South southeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

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

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 56. North northwest wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 72. North wind around 10 mph, with gusts as high as 15 mph.
Thursday Night
Mostly clear, with a low around 55. West wind around 5 mph.
Friday
Sunny, with a high near 79. West southwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 59. South southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 80.
Saturday Night
Clear, with a low around 60.
Sunday
Sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 60.
Monday
Sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Forest IL
 42.24°N 87.86°W
Last Update:
9:41 pm CDT Sep 24, 2025
Forecast Valid:
12am CDT Sep 25, 2025-6pm CDT Oct 1, 2025
 
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