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

Areas of Severe Thunderstorms and Heavy Rain Possible through the Weekend

There will be daily chances for scattered thunderstorms across portions of the Central and Eastern U.S. through the weekend, with severe thunderstorms possible in the northern Plains and Upper Midwest. Potential severe storm hazards may include large hail, damaging winds, and a few tornadoes. Storms could also produce heavy rain that may lead to isolated instances of flash flooding. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

76°F

24°C

Humidity 58%
Wind Speed SE 10 mph
Barometer 30.05 in (1016.6 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 28 Jun 12:51 pm CDT
Extended Forecast for

Round Lake Heights IL

  • This Afternoon

    This Afternoon: Increasing clouds, with a high near 85. South southeast wind around 5 mph.

    High: 85 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming mostly clear, with a low around 69. East southeast wind around 5 mph becoming south after midnight.

    Low: 69 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 93. Heat index values as high as 100. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South southwest wind 5 to 10 mph.

    Low: 70 °F

    Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. West northwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Increasing clouds, with a high near 85. South southeast wind around 5 mph.
Tonight
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 69. East southeast wind around 5 mph becoming south after midnight.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 93. Heat index values as high as 100. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South southwest wind 5 to 10 mph.
Monday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. West northwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 84.
Thursday Night
Partly cloudy, with a low around 64.
Independence Day
Mostly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Heights IL
 42.38°N 88.11°W
Last Update:
12:56 pm CDT Jun 28, 2025
Forecast Valid:
1pm CDT Jun 28, 2025-6pm CDT Jul 4, 2025
 
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