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.

Mostly Cloudy

57°F

14°C

Humidity 78%
Wind Speed NE 8 mph
Barometer 30.16 in (1021.0 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 14 Oct 8:51 pm CDT
Extended Forecast for

Round Lake IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 10am. High near 58. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers
    Likely then
    Showers

  • Thursday Night

    Thursday Night: Showers, mainly before 1am. Low around 48. East wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Showers

  • Friday

    Friday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 54. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%.

    High: 54 °F

    Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: Areas of frost after 5am. Otherwise, partly cloudy, with a low around 34. Breezy, with a north wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

    Low: 34 °F

    Partly Cloudy
    and Breezy
    then Areas
    Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 57.

    High: 57 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph.
Thursday
Showers, mainly after 10am. High near 58. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 1am. Low around 48. East wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 54. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%.
Friday Night
Areas of frost after 5am. Otherwise, partly cloudy, with a low around 34. Breezy, with a north wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 57.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 64.
Sunday Night
Mostly clear, with a low around 42.
Monday
Mostly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Mostly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake IL
 42.35°N 88.11°W
Last Update:
3:56 pm CDT Oct 14, 2026
Forecast Valid:
9pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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