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.

Overcast

76°F

24°C

Humidity 77%
Wind Speed W 3 mph
Barometer 29.94 in (1013.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 18 Aug 8:52 pm CDT
Extended Forecast for

Northbrook IL

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 1am. Low around 66. West wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    T-storms then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 77. Northwest wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 77 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 78. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. Southeast wind around 5 mph becoming south southwest after midnight.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Chance of precipitation is 30%.

    High: 80 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers and thunderstorms, mainly before 1am. Low around 66. West wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 77. Northwest wind 5 to 10 mph becoming east northeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 78. Calm wind becoming east southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 63. Southeast wind around 5 mph becoming south southwest after midnight.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 60.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Northbrook IL
 42.13°N 87.83°W
Last Update:
9:11 pm CDT Aug 18, 2026
Forecast Valid:
9pm CDT Aug 18, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

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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