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

59°F

15°C

Humidity 81%
Wind Speed S 10 mph
Barometer 30.08 in (1018.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 2 Nov 10:51 am CST
Extended Forecast for

Grayslake IL

  • Today

    Today: Patchy drizzle between noon and 4pm, then a slight chance of showers after 4pm. Cloudy, with a high near 60. South southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 60 °F

    Patchy
    Drizzle

  • Tonight

    Tonight: A 20 percent chance of showers. Cloudy, with a temperature rising to around 63 by 1am. South wind around 15 mph, with gusts as high as 30 mph.

    Low: 60 °F⇑

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Showers, mainly after 4pm. High near 69. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Breezy.
    Slight Chance
    Showers then
    Showers

  • Tuesday Night

    Tuesday Night: Showers. Low around 60. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.

    Low: 60 °F

    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after noon. Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 57.

    High: 57 °F

    Mostly Cloudy

Detailed Forecast

Today
Patchy drizzle between noon and 4pm, then a slight chance of showers after 4pm. Cloudy, with a high near 60. South southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tonight
A 20 percent chance of showers. Cloudy, with a temperature rising to around 63 by 1am. South wind around 15 mph, with gusts as high as 30 mph.
Tuesday
Showers, mainly after 4pm. High near 69. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers. Low around 60. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Wednesday
Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Wednesday Night
Mostly cloudy, with a low around 48.
Thursday
A 30 percent chance of showers after noon. Mostly cloudy, with a high near 58.
Thursday Night
Mostly cloudy, with a low around 44.
Friday
Mostly cloudy, with a high near 57.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
Partly sunny, with a high near 56.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
Last Update:
10:30 am CST Nov 2, 2026
Forecast Valid:
11am CST Nov 2, 2026-6pm CST Nov 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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