National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms and Excessive Rainfall Through This Weekend

Severe thunderstorms which can bring large hail, damaging winds, and isolated tornadoes will be possible over parts of the central U.S. through this weekend. Thunderstorms with heavy to excessive rainfall moving from Texas into the mid-Mississippi Valley through this weekend may produce areas of flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

61°F

16°C

Humidity 90%
Wind Speed NE 7 mph
Barometer 29.95 in (1013.2 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 7 Jun 4:51 am CDT
Extended Forecast for

Grayslake IL

  • Today

    Today: Partly sunny, with a high near 76. East wind 10 to 15 mph.

    High: 76 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 4am. Mostly cloudy, with a low around 64. East northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 64 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Showers and thunderstorms, mainly after 4pm. High near 81. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Slight Chance
    T-storms then
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms. Low around 68. Southeast wind 5 to 10 mph. Chance of precipitation is 80%.

    Low: 68 °F

    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. West southwest wind 5 to 10 mph.

    High: 85 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89.

    High: 89 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 76. East wind 10 to 15 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 4am. Mostly cloudy, with a low around 64. East northeast wind around 10 mph, with gusts as high as 15 mph.
Monday
Showers and thunderstorms, mainly after 4pm. High near 81. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and thunderstorms. Low around 68. Southeast wind 5 to 10 mph. Chance of precipitation is 80%.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. West southwest wind 5 to 10 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Thursday
A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89.
Thursday Night
Showers likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 66.
Friday
Mostly sunny, with a high near 83.
Friday Night
A chance of showers. Partly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
Last Update:
4:56 am CDT Jun 7, 2026
Forecast Valid:
5am CDT Jun 7, 2026-6pm CDT Jun 13, 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