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.

Fair

60°F

16°C

Humidity 100%
Wind Speed W 6 mph
Barometer 29.88 in (1011.4 mb)
Dewpoint 60°F (16°C)
Visibility 9.00 mi
Last update 25 Jun 3:51 am CDT
Extended Forecast for

Old Mill Creek IL

  • Overnight

    Overnight: Areas of fog. Otherwise, mostly cloudy, with a low around 58. West wind around 5 mph.

    Low: 58 °F

    Areas Fog

  • Thursday

    Thursday: A 20 percent chance of showers after 2pm. Areas of fog before 7am. Otherwise, mostly sunny, with a high near 76. West wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 76 °F

    Areas Fog
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 54. North wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 69. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 69 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 56. Northeast wind 5 to 10 mph.

    Low: 56 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Overnight
Areas of fog. Otherwise, mostly cloudy, with a low around 58. West wind around 5 mph.
Thursday
A 20 percent chance of showers after 2pm. Areas of fog before 7am. Otherwise, mostly sunny, with a high near 76. West wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Mostly cloudy, with a low around 54. North wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 69. East northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
Mostly cloudy, with a low around 56. Northeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 60.
Sunday
Partly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 72.
Monday
Mostly sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Mostly sunny and hot, with a high near 95.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny, with a high near 94.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Mill Creek IL
 42.44°N 87.99°W
Last Update:
3:01 am CDT Jun 25, 2026
Forecast Valid:
3am CDT Jun 25, 2026-6pm CDT Jul 1, 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