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

26°F

-3°C

Humidity 96%
Wind Speed E 3 mph
Barometer 30.26 in (1026.3 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 2 Mar 9:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. Southeast wind around 5 mph.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain before 9am. Mostly cloudy, with a high near 40. Southeast wind around 5 mph becoming northeast in the afternoon.

    High: 40 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32. Northeast wind around 5 mph becoming northwest in the evening.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 44. East wind around 5 mph.

    High: 44 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms. Mostly cloudy, with a low around 38. East wind around 5 mph. Chance of precipitation is 50%.

    Low: 38 °F

    Chance Rain

  • Thursday

    Thursday: Rain likely. Cloudy, with a high near 48. Northeast wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 48 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 38. North wind around 5 mph becoming east after midnight.

    Low: 38 °F

    Slight Chance
    Rain

  • Friday

    Friday: Rain, mainly after noon. High near 59. Southeast wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 59 °F

    Chance Rain
    then Rain

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 80%.

    Low: 48 °F

    Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 27. Southeast wind around 5 mph.
Tuesday
A 20 percent chance of rain before 9am. Mostly cloudy, with a high near 40. Southeast wind around 5 mph becoming northeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 32. Northeast wind around 5 mph becoming northwest in the evening.
Wednesday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 44. East wind around 5 mph.
Wednesday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 38. East wind around 5 mph. Chance of precipitation is 50%.
Thursday
Rain likely. Cloudy, with a high near 48. Northeast wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 38. North wind around 5 mph becoming east after midnight.
Friday
Rain, mainly after noon. High near 59. Southeast wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 80%.
Saturday
A 40 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 58.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 54.
Sunday Night
Mostly clear, with a low around 41.
Monday
A 20 percent chance of rain. Sunny, with a high near 56.
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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:
10:32 pm CST Mar 2, 2026
Forecast Valid:
10pm CST Mar 2, 2026-6pm CDT Mar 9, 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