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

33°F

1°C

Humidity 72%
Wind Speed SW 12 mph
Barometer 29.81 in (1010.6 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 5 Jan 1:51 am CST
Extended Forecast for

Round Lake Park IL

  • Overnight

    Overnight: Partly cloudy, with a low around 30. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 39. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 39 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A slight chance of drizzle after midnight. Patchy fog. Otherwise, mostly cloudy, with a low around 33. South wind around 5 mph becoming calm.

    Low: 33 °F

    Patchy Fog
    then Slight
    Chance
    Drizzle and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of drizzle before noon. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 42. South southeast wind 5 to 10 mph becoming west northwest in the afternoon.

    High: 42 °F

    Chance
    Drizzle and
    Patchy Fog
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31. West wind around 5 mph, with gusts as high as 10 mph.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of rain after noon. Partly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A chance of rain. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 30. South southwest wind around 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 39. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
A slight chance of drizzle after midnight. Patchy fog. Otherwise, mostly cloudy, with a low around 33. South wind around 5 mph becoming calm.
Tuesday
A chance of drizzle before noon. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 42. South southeast wind 5 to 10 mph becoming west northwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 31. West wind around 5 mph, with gusts as high as 10 mph.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A chance of rain after noon. Partly sunny, with a high near 48.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 34.
Friday
A chance of rain. Mostly cloudy, with a high near 42.
Friday Night
A chance of rain. Mostly cloudy, with a low around 28.
Saturday
A chance of snow. Mostly cloudy, with a high near 34.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 18.
Sunday
Partly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Park IL
 42.33°N 88.08°W
Last Update:
9:51 pm CST Jan 4, 2026
Forecast Valid:
2am CST Jan 5, 2026-6pm CST Jan 11, 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