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.

Overcast

37°F

3°C

Humidity 89%
Wind Speed SE 7 mph
Barometer 30.15 in (1021.7 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 9 Jan 10:51 pm CST
Extended Forecast for

Grayslake IL

  • Tonight

    Tonight: A chance of rain between 3am and 5am, then rain likely, possibly mixed with snow. Cloudy, with a steady temperature around 36. East southeast wind around 5 mph becoming south after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 36 °F

    Rain/Snow
    Likely

  • Saturday

    Saturday: Rain and snow before 11am, then a chance of snow showers. Temperature falling to around 30 by 5pm. South southwest wind 5 to 10 mph becoming west 10 to 15 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 35 °F⇓

    Rain/Snow
    then Chance
    Snow Showers

  • Saturday Night

    Saturday Night: Scattered snow showers. Mostly cloudy, with a low around 20. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    Low: 20 °F

    Scattered
    Snow Showers
    and Blustery

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 32. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 32 °F

    Partly Sunny
    and Breezy
    then Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain. Mostly cloudy, with a high near 44.

    High: 44 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
A chance of rain between 3am and 5am, then rain likely, possibly mixed with snow. Cloudy, with a steady temperature around 36. East southeast wind around 5 mph becoming south after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday
Rain and snow before 11am, then a chance of snow showers. Temperature falling to around 30 by 5pm. South southwest wind 5 to 10 mph becoming west 10 to 15 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Saturday Night
Scattered snow showers. Mostly cloudy, with a low around 20. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 32. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 24. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
A chance of rain. Mostly cloudy, with a high near 44.
Tuesday Night
A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 28.
Wednesday
A chance of snow. Mostly cloudy, with a high near 32.
Wednesday Night
Mostly cloudy, with a low around 16.
Thursday
Partly sunny, with a high near 28.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 21.
Friday
A chance of snow. Mostly cloudy, with a high near 32.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.05°W
Last Update:
10:26 pm CST Jan 9, 2026
Forecast Valid:
11pm CST Jan 9, 2026-6pm CST Jan 16, 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