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.

Fair

77°F

25°C

Humidity 88%
Wind Speed Calm
Barometer 29.90 in (1012.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 4 Sep 4:52 am CDT
Extended Forecast for

Northbrook IL

Heat Advisory September 4, 05:27am until September 4, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 4, 05:27am until September 4, 10:00pm

    NOW until 10:00pm Fri

    Heat Advisory

  • Overnight

    Low: 76 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 94. Heat index values as high as 102. North wind 5 to 10 mph becoming south in the morning. Winds could gust as high as 15 mph.

    High: 94 °F

    Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly between 1am and 4am. Increasing clouds, with a low around 73. West southwest wind around 5 mph.

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: Partly sunny, with a high near 81. North northeast wind 5 to 10 mph.

    High: 81 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a steady temperature around 76. Southwest wind around 5 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 94. Heat index values as high as 102. North wind 5 to 10 mph becoming south in the morning. Winds could gust as high as 15 mph.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly between 1am and 4am. Increasing clouds, with a low around 73. West southwest wind around 5 mph.
Saturday
Partly sunny, with a high near 81. North northeast wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 67. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 65.
Labor Day
Mostly sunny, with a high near 80.
Monday Night
Mostly cloudy, with a low around 66.
Tuesday
Partly sunny, with a high near 84.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 71.
Wednesday
Partly sunny, with a high near 88.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 69.
Thursday
Partly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Northbrook IL
 42.15°N 87.83°W
Last Update:
2:56 am CDT Sep 4, 2026
Forecast Valid:
5am CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
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Additional Resources

Radar & Satellite Image

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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