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

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Fair

40°F

4°C

Humidity 89%
Wind Speed Calm
Barometer 30.09 in (1019.3 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 14 May 12:52 am CDT
Extended Forecast for

Deer Park IL

  • Overnight

    Overnight: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 67. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 2am. Increasing clouds, with a low around 48. East southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 48 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 8am. Mostly cloudy through mid morning, then gradual clearing, with a high near 72. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 72 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 58. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Mostly Clear
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers before 1am. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 40. Calm wind.
Thursday
Sunny, with a high near 67. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of showers after 2am. Increasing clouds, with a low around 48. East southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
A 20 percent chance of showers before 8am. Mostly cloudy through mid morning, then gradual clearing, with a high near 72. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 58. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 76.
Sunday Night
A chance of showers before 1am. Mostly cloudy, with a low around 61.
Monday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Breezy.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Breezy.
Tuesday
Showers likely. Partly sunny, with a high near 74. Breezy.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 55.
Wednesday
A chance of showers. Partly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
Deer Park IL
 42.16°N 88.1°W
Last Update:
1:21 am CDT May 14, 2026
Forecast Valid:
1am CDT May 14, 2026-6pm CDT May 20, 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