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.

A Few Clouds

82°F

28°C

Humidity 44%
Wind Speed W 7 mph
Barometer 29.82 in (1008.9 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 16 May 5:51 pm CDT
Extended Forecast for

Waukegan IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 55. South wind around 5 mph becoming west northwest after midnight.

    Low: 55 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, with a high near 68. East southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 68 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy during the early evening, then becoming mostly clear, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely and
    Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. Breezy. Chance of precipitation is 70%.

    High: 82 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 55. South wind around 5 mph becoming west northwest after midnight.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, with a high near 68. East southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 65. South wind around 15 mph, with gusts as high as 25 mph.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. Breezy. Chance of precipitation is 70%.
Tuesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 48.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Partly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waukegan IL
 42.37°N 87.85°W
Last Update:
3:11 pm CDT May 16, 2026
Forecast Valid:
6pm CDT May 16, 2026-6pm CDT May 23, 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