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

77°F

25°C

Humidity 43%
Wind Speed SW 17 mph
Barometer 29.69 in (1005.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 30 Mar 6:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after 9pm. Mostly cloudy, with a low around 53. Southwest wind 10 to 15 mph. Chance of precipitation is 50%.

    Low: 53 °F

    Scattered
    T-storms

  • Tuesday

    Tuesday: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 64. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 64 °F

    Scattered
    T-storms then
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 7pm. Mostly cloudy, with a low around 35. North wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 35 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of rain before 4pm, then a chance of rain and snow. Mostly cloudy, with a high near 41. Northeast wind around 15 mph. Chance of precipitation is 40%.

    High: 41 °F

    Slight Chance
    Rain then
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain likely, possibly mixed with snow before 7pm, then rain. Some thunder is also possible. Low around 36. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 36 °F

    Rain/Snow
    Likely then
    Rain

  • Thursday

    Thursday: Rain, with thunderstorms also possible after 10am. High near 62. East wind around 15 mph becoming south in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 62 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm before 1am, then a chance of rain. Mostly cloudy, with a low around 44. South wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 44 °F

    Rain Likely

  • Friday

    Friday: A 20 percent chance of rain after 1pm. Partly sunny, with a high near 54. West wind around 10 mph becoming northeast in the afternoon.

    High: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: A chance of rain, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.

    Low: 41 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Tonight
Scattered showers and thunderstorms, mainly after 9pm. Mostly cloudy, with a low around 53. Southwest wind 10 to 15 mph. Chance of precipitation is 50%.
Tuesday
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 64. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
Showers likely, mainly before 7pm. Mostly cloudy, with a low around 35. North wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A chance of rain before 4pm, then a chance of rain and snow. Mostly cloudy, with a high near 41. Northeast wind around 15 mph. Chance of precipitation is 40%.
Wednesday Night
Rain likely, possibly mixed with snow before 7pm, then rain. Some thunder is also possible. Low around 36. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Rain, with thunderstorms also possible after 10am. High near 62. East wind around 15 mph becoming south in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Rain likely and possibly a thunderstorm before 1am, then a chance of rain. Mostly cloudy, with a low around 44. South wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A 20 percent chance of rain after 1pm. Partly sunny, with a high near 54. West wind around 10 mph becoming northeast in the afternoon.
Friday Night
A chance of rain, then rain likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.
Saturday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 36.
Sunday
A 20 percent chance of rain. Mostly cloudy, with a high near 47.
Sunday Night
Partly cloudy, with a low around 33.
Monday
Mostly sunny, with a high near 49.
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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:
6:36 pm CDT Mar 30, 2026
Forecast Valid:
7pm CDT Mar 30, 2026-6pm CDT Apr 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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