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.

A Few Clouds

56°F

13°C

Humidity 65%
Wind Speed Calm
Barometer 29.89 in (1012.2 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 28 Apr 8:51 pm CDT
Extended Forecast for

Round Lake Heights IL

  • Tonight

    Tonight: Scattered sprinkles before 10pm, then scattered showers, mainly between 10pm and 2am. Mostly cloudy, with a low around 44. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.

    Low: 44 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered sprinkles with isolated showers before 1pm, then isolated showers between 1pm and 5pm, then scattered sprinkles with isolated showers after 5pm. Partly sunny, with a high near 56. North wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    High: 56 °F

    Isolated
    Showers

  • Wednesday Night

    Wednesday Night: Scattered sprinkles before 7pm. Partly cloudy, with a low around 37. West northwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 37 °F

    Scattered
    Sprinkles

  • Thursday

    Thursday: Partly sunny, with a high near 55. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 55 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 35. North wind 5 to 10 mph.

    Low: 35 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

  • Friday Night

    Friday Night: Patchy frost after 1am. Otherwise, mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy
    then Patchy
    Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, mostly sunny, with a high near 54.

    High: 54 °F

    Areas Frost
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered sprinkles before 10pm, then scattered showers, mainly between 10pm and 2am. Mostly cloudy, with a low around 44. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.
Wednesday
Scattered sprinkles with isolated showers before 1pm, then isolated showers between 1pm and 5pm, then scattered sprinkles with isolated showers after 5pm. Partly sunny, with a high near 56. North wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Wednesday Night
Scattered sprinkles before 7pm. Partly cloudy, with a low around 37. West northwest wind around 5 mph, with gusts as high as 10 mph.
Thursday
Partly sunny, with a high near 55. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 35. North wind 5 to 10 mph.
Friday
Partly sunny, with a high near 50.
Friday Night
Patchy frost after 1am. Otherwise, mostly cloudy, with a low around 33.
Saturday
Areas of frost before 8am. Otherwise, mostly sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 61.
Sunday Night
Mostly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 66.
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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:
9:40 pm CDT Apr 28, 2026
Forecast Valid:
9pm CDT Apr 28, 2026-6pm CDT May 5, 2026
 
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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