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

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

40°F

4°C

Humidity 63%
Wind Speed SW 7 mph
Barometer 30.03 in (1018.1 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 13 Feb 7:51 pm CST
Extended Forecast for

Round Lake Heights IL

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 28. Southwest wind around 5 mph becoming calm.

    Low: 28 °F

    Clear then
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 54 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. Southeast wind around 5 mph becoming calm.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 56. West southwest wind around 5 mph becoming north in the afternoon.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 35. Calm wind becoming southwest around 5 mph after midnight. Winds could gust as high as 10 mph.

    Low: 35 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 28. Southwest wind around 5 mph becoming calm.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 31. Southeast wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 56. West southwest wind around 5 mph becoming north in the afternoon.
Sunday Night
Partly cloudy, with a low around 35. Calm wind becoming southwest around 5 mph after midnight. Winds could gust as high as 10 mph.
Washington's Birthday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
Mostly cloudy, with a high near 46.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 41.
Wednesday
A chance of showers before noon. Partly sunny, with a high near 54.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
A chance of showers. Mostly cloudy, with a high near 43.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 31.
Friday
Partly sunny, with a high near 38.
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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:
6:36 pm CST Feb 13, 2026
Forecast Valid:
8pm CST Feb 13, 2026-6pm CST Feb 20, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation