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 and Breezy

69°F

21°C

Humidity 66%
Wind Speed SW 23 G 32 mph
Barometer 29.92 in (1012.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 12 Apr 10:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Today

    Today: A chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 71. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers and thunderstorms before midnight, then a chance of showers between midnight and 1am. Patchy fog after 1am. Low around 59. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Showers then
    Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: Partly sunny, with a high near 76. Southwest wind around 10 mph.

    High: 76 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, with a low around 60. Southwest wind around 10 mph.

    Low: 60 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 76. Southwest wind around 10 mph. Chance of precipitation is 40%.

    High: 76 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 52. Southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 52 °F

    Showers

  • Wednesday

    Wednesday: Showers likely, then showers and possibly a thunderstorm after 1pm. High near 62. Northwest wind around 10 mph becoming southeast in the morning. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 62 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 52. South wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 67. Chance of precipitation is 30%.

    High: 67 °F

    Chance
    Showers

Detailed Forecast

Today
A chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 71. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms before midnight, then a chance of showers between midnight and 1am. Patchy fog after 1am. Low around 59. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Partly sunny, with a high near 76. Southwest wind around 10 mph.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, with a low around 60. Southwest wind around 10 mph.
Tuesday
A slight chance of thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 76. Southwest wind around 10 mph. Chance of precipitation is 40%.
Tuesday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 52. Southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers likely, then showers and possibly a thunderstorm after 1pm. High near 62. Northwest wind around 10 mph becoming southeast in the morning. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 52. South wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 67. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 49.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 71.
Friday Night
Showers and possibly a thunderstorm. Low around 50. Chance of precipitation is 80%.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.49°N 87.81°W (Elev. 600 ft)
Last Update:
11:41 am CDT Apr 12, 2026
Forecast Valid:
11am CDT Apr 12, 2026-6pm CDT Apr 18, 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