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.

Fair

45°F

7°C

Humidity 63%
Wind Speed SW 7 mph
Barometer 29.92 in (1013.2 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 30 Mar 4:51 am CDT
Extended Forecast for

Round Lake Heights IL

  • Today

    Today: Mostly sunny, with a high near 74. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 62. South wind 10 to 15 mph becoming west southwest after midnight. Winds could gust as high as 25 mph.

    Low: 62 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 72. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Breezy.
    Slight Chance
    T-storms then
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers after 1am. Low around 35. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 35 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of rain showers after 1pm, mixing with snow after 4pm. Mostly cloudy, with a high near 41. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Rain/Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow showers, becoming all rain after 1am. Low around 34. Breezy. Chance of precipitation is 90%.

    Low: 34 °F

    Rain/Snow and
    Breezy

  • Thursday

    Thursday: Showers. High near 56. Chance of precipitation is 90%.

    High: 56 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Showers
    Likely

  • Friday

    Friday: Mostly cloudy, with a high near 56.

    High: 56 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 74. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 62. South wind 10 to 15 mph becoming west southwest after midnight. Winds could gust as high as 25 mph.
Tuesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 72. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers after 1am. Low around 35. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Wednesday
A chance of rain showers after 1pm, mixing with snow after 4pm. Mostly cloudy, with a high near 41. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
Rain, possibly mixed with snow showers, becoming all rain after 1am. Low around 34. Breezy. Chance of precipitation is 90%.
Thursday
Showers. High near 56. Chance of precipitation is 90%.
Thursday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 41.
Friday
Mostly cloudy, with a high near 56.
Friday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 39.
Saturday
Showers likely. Cloudy, with a high near 60.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 35.
Sunday
Partly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Heights IL
 42.38°N 88.11°W
Last Update:
5:21 am CDT Mar 30, 2026
Forecast Valid:
5am CDT Mar 30, 2026-6pm CDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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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