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

51°F

11°C

Humidity 74%
Wind Speed W 8 mph
Barometer 29.65 in (1003.9 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 4 May 1:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Mostly clear, with a low around 46. Southwest wind around 5 mph.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75. Southwest wind 10 to 15 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Southwest wind 5 to 10 mph becoming north in the evening. Chance of precipitation is 50%.

    Low: 45 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A 10 percent chance of showers before 7am. Mostly cloudy, with a high near 54. Northwest wind around 5 mph becoming east in the afternoon.

    High: 54 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41. South wind around 5 mph becoming northwest after midnight.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 54. Northwest wind around 5 mph.

    High: 54 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40. East wind around 5 mph becoming west after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 56. West wind around 5 mph.

    High: 56 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 46. Southwest wind around 5 mph.
Monday
Sunny, with a high near 75. Southwest wind 10 to 15 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Southwest wind 5 to 10 mph becoming north in the evening. Chance of precipitation is 50%.
Tuesday
A 10 percent chance of showers before 7am. Mostly cloudy, with a high near 54. Northwest wind around 5 mph becoming east in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 41. South wind around 5 mph becoming northwest after midnight.
Wednesday
Partly sunny, with a high near 54. Northwest wind around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 40. East wind around 5 mph becoming west after midnight.
Thursday
Partly sunny, with a high near 56. West wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 43.
Friday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 57.
Friday Night
Partly cloudy, with a low around 41.
Saturday
Sunny, with a high near 62.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 45.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.49°N 87.81°W (Elev. 600 ft)
Last Update:
1:21 am CDT May 4, 2026
Forecast Valid:
2am CDT May 4, 2026-6pm CDT May 10, 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