National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

19°F

-7°C

Humidity 68%
Wind Speed W 13 G 23 mph
Barometer 30.06 in (1019.5 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 11 Jan 2:51 am CST
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: A slight chance of snow before 5am, then a chance of flurries after 5am. Cloudy, with a low around 22. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 22 °F

    Slight Chance
    Snow and
    Breezy

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 33. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 35 mph.

    High: 33 °F

    Decreasing
    Clouds and
    Breezy then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 41. West wind 10 to 15 mph.

    High: 41 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 33. Southwest wind around 10 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 46. Southwest wind around 15 mph.

    High: 46 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A slight chance of rain after midnight, mixing with snow after 3am. Mostly cloudy, with a low around 25. West wind 10 to 15 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Snow likely, mainly before noon. Mostly cloudy, with a high near 33. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    High: 33 °F

    Snow Likely
    and Breezy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Overnight
A slight chance of snow before 5am, then a chance of flurries after 5am. Cloudy, with a low around 22. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 33. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 35 mph.
Sunday Night
Partly cloudy, with a low around 27. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Monday
Mostly sunny, with a high near 41. West wind 10 to 15 mph.
Monday Night
Increasing clouds, with a low around 33. Southwest wind around 10 mph.
Tuesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 46. Southwest wind around 15 mph.
Tuesday Night
A slight chance of rain after midnight, mixing with snow after 3am. Mostly cloudy, with a low around 25. West wind 10 to 15 mph. Chance of precipitation is 20%.
Wednesday
Snow likely, mainly before noon. Mostly cloudy, with a high near 33. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Wednesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.
Thursday
A 20 percent chance of snow after noon. Partly sunny, with a high near 28.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 23.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 33.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 18.
Saturday
A 20 percent chance of snow. Mostly cloudy, with a high near 25.
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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:
3:07 am CST Jan 11, 2026
Forecast Valid:
3am CST Jan 11, 2026-6pm CST Jan 17, 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