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

49°F

9°C

Humidity 64%
Wind Speed NE 14 G 22 mph
Barometer 30.23 in (1024.1 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 21 May 6:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. East northeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 47 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 60. East northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 60 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of showers after 1am. Cloudy, with a low around 49. East northeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 49 °F

    Cloudy then
    Slight Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly before 10am. Mostly cloudy, with a high near 61. North northeast wind around 10 mph.

    High: 61 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 50. North northeast wind around 5 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 66.

    High: 66 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. East northeast wind around 15 mph, with gusts as high as 25 mph.
Friday
Mostly cloudy, with a high near 60. East northeast wind around 15 mph, with gusts as high as 25 mph.
Friday Night
A 20 percent chance of showers after 1am. Cloudy, with a low around 49. East northeast wind around 15 mph, with gusts as high as 25 mph.
Saturday
A 30 percent chance of showers, mainly before 10am. Mostly cloudy, with a high near 61. North northeast wind around 10 mph.
Saturday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 50. North northeast wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 66.
Sunday Night
Partly cloudy, with a low around 53.
Memorial Day
Mostly sunny, with a high near 70.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
A chance of showers. Partly sunny, with a high near 68.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 56.
Thursday
Partly sunny, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
4:06 pm CDT May 21, 2026
Forecast Valid:
7pm CDT May 21, 2026-6pm CDT May 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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