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

75°F

24°C

Humidity 88%
Wind Speed SE 3 mph
Barometer 29.88 in (1010.8 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 11 Aug 6:51 pm CDT
Extended Forecast for

2 Miles NNW Winthrop Harbor IL

  • Tonight

    Tonight: A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 4am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 77. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 77 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 66. East wind around 5 mph becoming calm.

    Low: 66 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 76. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 74. Northeast wind around 10 mph.

    High: 74 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Northeast wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 50%.

    Low: 64 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 76. Southeast wind around 15 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 76 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

Detailed Forecast

Tonight
A slight chance of showers before 1am, then a slight chance of showers and thunderstorms between 1am and 4am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 67. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 77. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 66. East wind around 5 mph becoming calm.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 76. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 74. Northeast wind around 10 mph.
Friday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Northeast wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 50%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 76. Southeast wind around 15 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 78.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 64.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Winthrop Harbor IL
 42.52°N 87.84°W (Elev. 623 ft)
Last Update:
6:31 pm CDT Aug 11, 2026
Forecast Valid:
7pm CDT Aug 11, 2026-6pm CDT Aug 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