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

53°F

12°C

Humidity 66%
Wind Speed NE 16 G 30 mph
Barometer 29.81 in (1010.0 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 20 Mar 2:51 pm CDT
Extended Forecast for

Third Lake IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 66. North northwest wind around 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. North northeast wind 5 to 10 mph becoming east after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 69. East southeast wind 5 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 69 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. South southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain. Mostly cloudy, with a high near 47. North wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 47 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 66. North northwest wind around 10 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, with a low around 36. North northeast wind 5 to 10 mph becoming east after midnight.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 69. East southeast wind 5 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 45. South southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.
Sunday
A 20 percent chance of rain. Mostly cloudy, with a high near 47. North wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Mostly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 44.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Mostly cloudy, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 39.
Thursday
A chance of showers. Mostly cloudy, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Third Lake IL
 42.37°N 87.99°W
Last Update:
2:31 pm CDT Mar 20, 2026
Forecast Valid:
3pm CDT Mar 20, 2026-6pm CDT Mar 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