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.

Fair

82°F

28°C

Humidity 47%
Wind Speed SW 16 mph
Barometer 29.84 in (1009.6 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 16 May 3:51 pm CDT
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 58. North northwest wind around 5 mph becoming south southeast in the evening.

    Low: 58 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, with a high near 82. Northeast wind 5 to 10 mph becoming south southeast 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 82 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. South southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. High near 82. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    High: 82 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. Breezy. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely and
    Breezy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 58. North northwest wind around 5 mph becoming south southeast in the evening.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, with a high near 82. Northeast wind 5 to 10 mph becoming south southeast 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 66. South southwest wind around 15 mph, with gusts as high as 25 mph.
Monday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. High near 82. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. Breezy. Chance of precipitation is 70%.
Tuesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 48.
Wednesday
Partly sunny, with a high near 62.
Wednesday Night
Mostly cloudy, with a low around 42.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
3:11 pm CDT May 16, 2026
Forecast Valid:
4pm CDT May 16, 2026-6pm CDT May 23, 2026
 
Forecast Discussion
 
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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