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

69°F

21°C

Humidity 61%
Wind Speed Vrbl 6 mph
Barometer 30.08 in (1018.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Aug 10:51 am CDT
Extended Forecast for

Round Lake ILSimilar City Names

  • This Afternoon

    This Afternoon: Sunny, with a high near 76. Northwest wind around 5 mph, with gusts as high as 10 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. East wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. Light southwest wind becoming south southwest 5 to 10 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 62. South wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 82. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 82 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of thunderstorms before 7pm. Mostly clear, with a low around 62. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 76. Northwest wind around 5 mph, with gusts as high as 10 mph.
Tonight
Mostly clear, with a low around 55. East wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 79. Light southwest wind becoming south southwest 5 to 10 mph in the morning.
Tuesday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 62. South wind 5 to 10 mph. Chance of precipitation is 20%.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 82. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of thunderstorms before 7pm. Mostly clear, with a low around 62. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 59.
Friday
Sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Partly sunny, with a high near 81.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 64.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Round Lake ILSimilar City Names
 42.35°N 88.11°W
Last Update:
12:10 pm CDT Aug 24, 2026
Forecast Valid:
12pm CDT Aug 24, 2026-6pm CDT Aug 30, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation