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 and Breezy

60°F

16°C

Humidity 58%
Wind Speed W 21 G 36 mph
Barometer 29.85 in (1011.2 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 16 Feb 11:51 am CST
Extended Forecast for

Round Lake Heights IL

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 62. Breezy, with a west southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 62 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 37. Southwest wind around 5 mph becoming east after midnight. Winds could gust as high as 15 mph.

    Low: 37 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, cloudy, with a high near 50. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 50 °F

    Patchy Fog
    then Cloudy

  • Tuesday Night

    Tuesday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 46. Southeast wind around 15 mph becoming south southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers before noon. Sunny, with a high near 62. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 62 °F

    Breezy.
    Slight Chance
    Showers then
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Rain Likely

  • Friday

    Friday: A chance of rain and snow before noon. Partly sunny, with a high near 41.

    High: 41 °F

    Chance
    Rain/Snow
    then Partly
    Sunny

Detailed Forecast

Washington's Birthday
Sunny, with a high near 62. Breezy, with a west southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tonight
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 37. Southwest wind around 5 mph becoming east after midnight. Winds could gust as high as 15 mph.
Tuesday
Patchy fog before 9am. Otherwise, cloudy, with a high near 50. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 46. Southeast wind around 15 mph becoming south southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers before noon. Sunny, with a high near 62. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 52.
Thursday Night
Rain likely. Mostly cloudy, with a low around 34.
Friday
A chance of rain and snow before noon. Partly sunny, with a high near 41.
Friday Night
Mostly cloudy, with a low around 26.
Saturday
Partly sunny, with a high near 37.
Saturday Night
Mostly cloudy, with a low around 21.
Sunday
Partly sunny, with a high near 31.
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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:
11:46 am CST Feb 16, 2026
Forecast Valid:
12pm CST Feb 16, 2026-6pm CST Feb 22, 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