Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Scattered strong to severe thunderstorms are possible across parts of the Northeast U.S. on Thursday. Damaging wind, hail, and a tornado or two are possible. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

67°F

19°C

Humidity 81%
Wind Speed Vrbl 5 mph
Barometer 29.93 in (1012.4 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 27 Aug 12:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Mostly clear, with a low around 63. Northwest wind around 10 mph.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Northwest wind around 10 mph becoming east in the afternoon.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. East wind 5 to 10 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76. Northwest wind 5 to 10 mph becoming southeast in the afternoon.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. South southeast wind 5 to 10 mph.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 67. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers before 1pm.  Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers after 1am.  Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 63. Northwest wind around 10 mph.
Thursday
Sunny, with a high near 75. Northwest wind around 10 mph becoming east in the afternoon.
Thursday Night
Mostly clear, with a low around 62. East wind 5 to 10 mph.
Friday
Sunny, with a high near 76. Northwest wind 5 to 10 mph becoming southeast in the afternoon.
Friday Night
Partly cloudy, with a low around 64. South southeast wind 5 to 10 mph.
Saturday
Partly sunny, with a high near 80.
Saturday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Sunday
A chance of showers before 1pm. Partly sunny, with a high near 85.
Sunday Night
A chance of showers after 1am. Mostly cloudy, with a low around 70.
Monday
Partly sunny, with a high near 86.
Monday Night
A chance of showers. Mostly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Mostly cloudy, with a low around 69.
Wednesday
Partly sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.81°W
7:41 pm CDT Aug 26, 2026
1am CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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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