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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Mostly Cloudy

45°F

7°C

Humidity 74%
Wind Speed W 12 G 23 mph
Barometer 29.72 in (1006.0 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 18 Apr 6:51 am CDT
Extended Forecast for

Round Lake Heights IL

Flood Warning until April 18, 08:00am
Click here for hazard details and duration
...
  •  
    Flood Warning until April 18, 08:00am

    NOW until 8:00am Sat

    Flood Warning

  • Today

    High: 49 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 33. West southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 33 °F

    Partly Cloudy
    then Frost

  • Sunday

    Sunday: A 30 percent chance of showers after 1pm. Widespread frost before 7am. Otherwise, mostly sunny, with a high near 48. Southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 48 °F

    Frost then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 30. Northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.

    Low: 30 °F

    Partly Cloudy
    then Frost

  • Monday

    Monday: Widespread frost before 8am. Otherwise, sunny, with a high near 52. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 15 mph.

    High: 52 °F

    Frost then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly cloudy, with a high near 49. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph.
Tonight
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 33. West southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
A 30 percent chance of showers after 1pm. Widespread frost before 7am. Otherwise, mostly sunny, with a high near 48. Southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 30. Northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.
Monday
Widespread frost before 8am. Otherwise, sunny, with a high near 52. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Showers likely. Mostly cloudy, with a low around 59.
Friday
A chance of showers. Mostly cloudy, with a high near 72.
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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:
6:46 am CDT Apr 18, 2026
Forecast Valid:
7am CDT Apr 18, 2026-6pm CDT Apr 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation