National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Mostly Cloudy

39°F

4°C

Humidity 67%
Wind Speed E 3 mph
Barometer 30.17 in (1022.5 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 19 Apr 7:51 pm CDT
Extended Forecast for

Lake Bluff IL

Freeze Warning April 20, 12:00am until April 20, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Tonight

    Tonight: Widespread frost, mainly after 1am. Otherwise, partly cloudy, with a low around 28. Northeast wind 5 to 10 mph becoming light north northeast after midnight.

    Low: 28 °F

    Frost

  • Monday

    Monday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 46. Light east southeast wind becoming southeast 5 to 10 mph in the morning.

    High: 46 °F

    Frost then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a steady temperature around 45. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. West wind around 5 mph becoming north after midnight. Winds could gust as high as 10 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Showers
    Likely

Detailed Forecast

Tonight
Widespread frost, mainly after 1am. Otherwise, partly cloudy, with a low around 28. Northeast wind 5 to 10 mph becoming light north northeast after midnight.
Monday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 46. Light east southeast wind becoming southeast 5 to 10 mph in the morning.
Monday Night
Mostly cloudy, with a steady temperature around 45. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 70. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 46. West wind around 5 mph becoming north after midnight. Winds could gust as high as 10 mph.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 58.
Friday
A chance of showers. Mostly cloudy, with a high near 70.
Friday Night
A chance of showers. Mostly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
Partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Bluff IL
 42.28°N 87.88°W
Last Update:
7:05 pm CDT Apr 19, 2026
Forecast Valid:
8pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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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