National Weather Service United States Department of Commerce

The flash flooding threat shifts slightly east on Friday while both coasts and Hawaii continue high surf issues due to tropical systems

The potential for heavy rainfall and flash flooding will shift east on Friday across parts of the Upper Midwest into the eastern Great Lakes. Meanwhile, portions of both the East and West Coasts, as well as Hawaii, will continue to have high surf and rip current potential due to Hurricane Cristobal and Tropical Storm Marie respectively. Caution should be used on area beaches.
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Hazardous Weather Conditions

Current Conditions

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Grayslake IL

7 Day Forecast

For More Weather Information:

Chicago, IL Local Forecast Office

Today

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

High: 83 °F

Tonight

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

Low: 70 °F

Saturday

Thunderstorms Likely Chance for Measurable Precipitation 60%

Thunderstorms
Likely

High: 79 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

Low: 66 °F

Sunday

Patchy Fog

Patchy
Fog

High: 82 °F

Sunday
Night

Partly Cloudy

Partly
Cloudy

Low: 68 °F

Labor
Day

Thunderstorms Likely Chance for Measurable Precipitation 60%

Thunderstorms
Likely

High: 81 °F

Monday
Night

Thunderstorms Likely

Thunderstorms
Likely

Low: 64 °F

Tuesday

Slight Chance Thunderstorms

Slight Chc
Thunderstorms

High: 80 °F

Detailed Forecast

  • Today A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 10 to 15 mph, with gusts as high as 25 mph.
  • Tonight A 50 percent chance of showers and thunderstorms. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 70. South wind around 15 mph, with gusts as high as 25 mph.
  • Saturday Showers and thunderstorms likely, mainly between 8am and 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 79. Southwest wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
  • Saturday Night A 50 percent chance of showers and thunderstorms before 8pm. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 66. West southwest wind 5 to 10 mph.
  • Sunday Patchy fog before 8am. Otherwise, mostly sunny, with a high near 82. West wind around 5 mph becoming south southeast in the afternoon.
  • Sunday Night Partly cloudy, with a low around 68.
  • Labor Day Showers and thunderstorms likely after 8am. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
  • Monday Night Showers and thunderstorms likely. Partly cloudy, with a low around 64.
  • Tuesday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80.
  • Tuesday Night Partly cloudy, with a low around 63.
  • Wednesday Mostly sunny, with a high near 81.
  • Wednesday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 65.
  • Thursday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82.