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.

Overcast

37°F

3°C

Humidity 73%
Wind Speed W 12 G 21 mph
Barometer 30.01 in (1017.1 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 5 Apr 6:51 am CDT
Extended Forecast for

Zion IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 50. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 50 °F

    Mostly Cloudy
    and Breezy
    then Sunny

  • Tonight

    Tonight: A 40 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 35. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 46. Northwest wind around 15 mph, with gusts as high as 25 mph.

    High: 46 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 35. North wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 35 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Partly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 50. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
A 40 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 35. West wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 46. Northwest wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 25. North wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 35. North wind 5 to 10 mph becoming east southeast in the afternoon.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 30.
Wednesday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 58.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 50.
Thursday
A chance of showers. Partly sunny, with a high near 64.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 40.
Friday
A chance of showers. Mostly cloudy, with a high near 50.
Friday Night
A chance of showers. Mostly cloudy, with a low around 40.
Saturday
A chance of showers. Mostly cloudy, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
3:56 am CDT Apr 5, 2026
Forecast Valid:
6am CDT Apr 5, 2026-6pm CDT Apr 11, 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