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.

Fog/Mist

65°F

18°C

Humidity 90%
Wind Speed Calm
Barometer 30.06 in (1016.7 mb)
Dewpoint 62°F (17°C)
Visibility 5.00 mi
Last update 15 Jul 4:51 am CDT
Extended Forecast for

Round Lake Heights IL

  • Today

    Today: Sunny, with a high near 88. Light south southwest wind becoming south 5 to 10 mph in the morning.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm in the evening.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Heat index values as high as 97. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 65. West southwest wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 60%.

    Low: 65 °F

    T-storms
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 73. Northwest wind 10 to 15 mph becoming north northeast in the afternoon.

    High: 73 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 88. Light south southwest wind becoming south 5 to 10 mph in the morning.
Tonight
Partly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Heat index values as high as 97. Light southwest wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 65. West southwest wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 60%.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 73. Northwest wind 10 to 15 mph becoming north northeast in the afternoon.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 62.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Sunday
A chance of showers. Partly sunny, with a high near 81.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 65.
Monday
A chance of showers. Partly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Heights IL
 42.38°N 88.11°W
Last Update:
4:11 am CDT Jul 15, 2025
Forecast Valid:
5am CDT Jul 15, 2025-6pm CDT Jul 21, 2025
 
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