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

46°F

8°C

Humidity 50%
Wind Speed SE 15 mph
Barometer 30.30 in (1027.0 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 20 Apr 1:51 pm CDT
Extended Forecast for

Long Lake IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 54. South wind around 10 mph, with gusts as high as 15 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 43. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 43 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 74. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 74 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 70. East wind around 5 mph, with gusts as high as 10 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 73.

    High: 73 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 54. South wind around 10 mph, with gusts as high as 15 mph.
Tonight
Mostly cloudy, with a low around 43. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 74. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 46. West wind around 5 mph becoming north northeast after midnight. Winds could gust as high as 10 mph.
Wednesday
Sunny, with a high near 70. East wind around 5 mph, with gusts as high as 10 mph.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 61.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 73.
Friday Night
A chance of showers before 1am. Mostly cloudy, with a low around 46.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
1:20 pm CDT Apr 20, 2026
Forecast Valid:
2pm CDT Apr 20, 2026-6pm CDT Apr 26, 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