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

Thunderstorms and Widespread Rainfall Across the Southern Plains

Isolated severe thunderstorms and widespread showers may produce flash flooding across the Southern Plains through Thursday. Numerous instances of flash flooding are expected in south-central Texas, including portions of the Hill Country; and an additional area across eastern Oklahoma into the Ozarks on Thursday. Heavy rainfall and mountain snow will return to southern California on Thursday. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fog/Mist

42°F

6°C

Humidity 96%
Wind Speed S 5 mph
Barometer 30.13 in (1020.8 mb)
Dewpoint 41°F (5°C)
Visibility 4.00 mi
Wind Chill39°F (4°C)
Last update 20 Nov 12:51 am CST
Extended Forecast for

Mc Cullom Lake IL

  • Overnight

    Overnight: Patchy drizzle and fog. Cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Patchy
    Drizzle and
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 9am. Otherwise, cloudy, with a high near 46. Calm wind becoming southwest around 5 mph in the morning.

    High: 46 °F

    Patchy Fog
    then Cloudy

  • Thursday Night

    Thursday Night: Cloudy, with a steady temperature around 44. Calm wind.

    Low: 44 °F

    Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 50. North northwest wind around 5 mph, with gusts as high as 10 mph.

    High: 50 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 29. North wind around 5 mph becoming calm in the evening.

    Low: 29 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy drizzle and fog. Cloudy, with a low around 41. Calm wind.
Thursday
Patchy fog before 9am. Otherwise, cloudy, with a high near 46. Calm wind becoming southwest around 5 mph in the morning.
Thursday Night
Cloudy, with a steady temperature around 44. Calm wind.
Friday
Mostly cloudy, with a high near 50. North northwest wind around 5 mph, with gusts as high as 10 mph.
Friday Night
Mostly cloudy, with a low around 29. North wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 49.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 33.
Monday
Partly sunny, with a high near 54.
Monday Night
A chance of rain. Mostly cloudy, with a low around 40.
Tuesday
A chance of rain. Mostly cloudy, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 42.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mc Cullom Lake IL
 42.36°N 88.29°W
Last Update:
1:05 am CST Nov 20, 2025
Forecast Valid:
1am CST Nov 20, 2025-6pm CST Nov 26, 2025
 
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