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 and Breezy

70°F

21°C

Humidity 79%
Wind Speed SW 21 G 31 mph
Barometer 29.69 in (1004.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 14 Apr 1:51 am CDT
Extended Forecast for

Winthrop Harbor IL

Severe T-storm Watch until April 14, 04:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until April 14, 04:00am

    NOW until 4:00am Tue

    Severe T-storm Watch

  • Overnight

    Low: 53 °F

    Severe
    Thunderstorms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly cloudy, with a high near 72. Southwest wind around 10 mph.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Low around 57. Southwest wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 57 °F

    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 69. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 69 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 53. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Showers
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers. Mostly cloudy, with a high near 63. Southwest wind 5 to 10 mph.

    High: 63 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 47. Northwest wind around 5 mph becoming northeast after midnight.

    Low: 47 °F

    Slight Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 65. Southeast wind 5 to 10 mph.

    High: 65 °F

    Partly Sunny

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Some of the storms could be severe. Low around 53. Northwest wind 5 to 10 mph becoming southwest. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly cloudy, with a high near 72. Southwest wind around 10 mph.
Tuesday Night
Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Low around 57. Southwest wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm. High near 69. South wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 53. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 50 percent chance of showers. Mostly cloudy, with a high near 63. Southwest wind 5 to 10 mph.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 47. Northwest wind around 5 mph becoming northeast after midnight.
Friday
Partly sunny, with a high near 65. Southeast wind 5 to 10 mph.
Friday Night
A chance of showers, then showers and possibly a thunderstorm after 1am. Low around 51. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 35.
Monday
Sunny, with a high near 53.
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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:
2:16 am CDT Apr 14, 2026
Forecast Valid:
2am CDT Apr 14, 2026-6pm CDT Apr 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