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

76°F

24°C

Humidity 36%
Wind Speed NW 10 mph
Barometer 29.81 in (1008.6 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 7 Oct 2:51 pm CDT
Extended Forecast for

Round Lake IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 76. West northwest wind around 10 mph, with gusts as high as 20 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 48. West northwest wind around 5 mph, with gusts as high as 15 mph.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 68. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 68 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46. West northwest wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 70. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 70 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 76. West northwest wind around 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 48. West northwest wind around 5 mph, with gusts as high as 15 mph.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 68. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Partly cloudy, with a low around 46. West northwest wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 70. South wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly cloudy, with a low around 57.
Sunday
Partly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 55.
Columbus Day
Partly sunny, with a high near 75.
Monday Night
A chance of showers. Mostly cloudy, with a low around 47.
Tuesday
Partly sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Round Lake IL
 42.33°N 88.11°W
Last Update:
1:20 pm CDT Oct 7, 2026
Forecast Valid:
3pm CDT Oct 7, 2026-6pm CDT Oct 13, 2026
 
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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