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

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

43°F

6°C

Humidity 86%
Wind Speed NE 6 mph
Barometer 29.81 in (1009.4 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 31 Mar 2:51 pm CDT
Extended Forecast for

Zion IL

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Steady temperature around 42. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 42 °F

    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 9pm, then a slight chance of showers between 9pm and 10pm. Cloudy, with a low around 34. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 34 °F

    T-storms
    Likely then
    Cloudy

  • Wednesday

    Wednesday: A 10 percent chance of showers after 5pm. Mostly cloudy, with a high near 42. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 42 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 38. Breezy, with an east northeast wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.

    Low: 38 °F

    Showers and
    Breezy

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 66. Breezy, with an east southeast wind 15 to 25 mph becoming south in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%.

    High: 66 °F

    Breezy.
    Showers
    Likely then
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 44. Breezy.

    Low: 44 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Showers

  • Saturday

    Saturday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 56.

    High: 56 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Steady temperature around 42. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 9pm, then a slight chance of showers between 9pm and 10pm. Cloudy, with a low around 34. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 10 percent chance of showers after 5pm. Mostly cloudy, with a high near 42. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 38. Breezy, with an east northeast wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Thursday
Showers and possibly a thunderstorm. High near 66. Breezy, with an east southeast wind 15 to 25 mph becoming south in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 100%.
Thursday Night
A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 44. Breezy.
Friday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 55.
Friday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 43.
Saturday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 56.
Saturday Night
A chance of showers before 1am. Mostly cloudy, with a low around 33. Breezy.
Sunday
Partly sunny, with a high near 44.
Sunday Night
Mostly clear, with a low around 32.
Monday
Mostly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
3:31 pm CDT Mar 31, 2026
Forecast Valid:
3pm CDT Mar 31, 2026-6pm CDT Apr 6, 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