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

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

74°F

23°C

Humidity 94%
Wind Speed SW 6 mph
Barometer 29.93 in (1012.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 2 Sep 1:51 am CDT
Extended Forecast for

Grandwood Park IL

Heat Advisory September 2, 12:00pm until September 2, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 73. Southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming east southeast in the evening.

    Low: 72 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Heat index values as high as 95. Calm wind becoming east northeast around 5 mph in the morning.

    High: 87 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 70. East wind around 5 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 73. Southwest wind around 5 mph, with gusts as high as 10 mph.
Wednesday
Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming east southeast in the evening.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Heat index values as high as 95. Calm wind becoming east northeast around 5 mph in the morning.
Thursday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 70. East wind around 5 mph. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Saturday
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 81.
Saturday Night
Partly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 81.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 64.
Labor Day
Partly sunny, with a high near 80.
Monday Night
Mostly cloudy, with a low around 63.
Tuesday
Partly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grandwood Park IL
 42.39°N 87.99°W
Last Update:
1:21 am CDT Sep 2, 2026
Forecast Valid:
2am CDT Sep 2, 2026-6pm CDT Sep 8, 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