Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

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. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

74°F

23°C

Humidity 67%
Wind Speed N 8 mph
Barometer 30.01 in (1015.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 27 Aug 9:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Today

    Today: Mostly sunny, with a high near 76. North northwest wind around 10 mph becoming east in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. East wind around 5 mph becoming west southwest after midnight.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76. West southwest 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 wind around 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 79. South wind 5 to 15 mph.

    High: 79 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 69.

    Low: 69 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers after 1am.  Mostly cloudy, with a low around 71.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 84.

    High: 84 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 76. North northwest wind around 10 mph becoming east in the afternoon.
Tonight
Mostly clear, with a low around 62. East wind around 5 mph becoming west southwest after midnight.
Friday
Sunny, with a high near 76. West southwest wind 5 to 10 mph becoming southeast in the afternoon.
Friday Night
Partly cloudy, with a low around 64. South wind around 5 mph.
Saturday
Partly sunny, with a high near 79. South wind 5 to 15 mph.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69.
Sunday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84.
Sunday Night
A chance of showers after 1am. Mostly cloudy, with a low around 71.
Monday
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84.
Monday Night
A chance of showers after 1am. Mostly cloudy, with a low around 71.
Tuesday
A chance of showers. Partly sunny, with a high near 84.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
9:31 am CDT Aug 27, 2026
10am 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