Sunday Brings Heat Relief For Some; Flash Flood Threat Along Cold Front

A cold front shifting across the Central Plains, Midwest, Great Lakes and Northeast on Sunday will bring some relief from the heat with cooler and drier air. Excessive heat holds Sunday roughly south of I-70. Heavy rain from thunderstorms along the front may bring flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

74°F

23°C

Humidity 88%
Wind Speed Calm
Barometer 29.84 in (1009.0 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 20 Jul 8:55 pm CDT
Extended Forecast for

Grayslake IL

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly after 1am.  Increasing clouds, with a low around 68. West wind 5 to 10 mph becoming northeast after midnight.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Chance
    T-storms then
    T-storms
    Likely

    Low: 68 °F

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms, mainly before 1pm.  Mostly cloudy, with a high near 78. Northeast wind 5 to 10 mph.

    Chance
    T-storms

    High: 78 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 62. North northeast wind 5 to 10 mph.

    Mostly Cloudy

    Low: 62 °F

  • Monday

    Monday: A 20 percent chance of showers before 1pm.  Mostly sunny, with a high near 75. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Slight Chance
    Showers

    High: 75 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 59. North wind around 5 mph becoming calm. Winds could gust as high as 15 mph.

    Mostly Clear

    Low: 59 °F

  • Tuesday

    Tuesday: A 20 percent chance of showers after 1pm.  Sunny, with a high near 81.

    Sunny then
    Slight Chance
    Showers

    High: 81 °F

  • Tuesday
    Night

    Tuesday Night: Mostly clear, with a low around 61.

    Mostly Clear

    Low: 61 °F

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    Sunny

    High: 83 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 63.

    Mostly Clear

    Low: 63 °F

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly after 1am. Increasing clouds, with a low around 68. West wind 5 to 10 mph becoming northeast after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 78. Northeast wind 5 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 62. North northeast wind 5 to 10 mph.
Monday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 75. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Monday Night
Mostly clear, with a low around 59. North wind around 5 mph becoming calm. Winds could gust as high as 15 mph.
Tuesday
A 20 percent chance of showers after 1pm. Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 86.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Click Map For Forecast
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
9:15 pm CDT Jul 20, 2019
9pm CDT Jul 20, 2019-6pm CDT Jul 27, 2019
 
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