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

61°F

16°C

Humidity 97%
Wind Speed W 18 G 30 mph
Barometer 29.76 in (1006.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 13 Apr 1:51 am CDT
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 58. Southwest wind around 15 mph, with gusts as high as 30 mph.

    Low: 58 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 74. West southwest wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 74 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 58. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    High: 78 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 52. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 52 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 58. Southwest wind around 15 mph, with gusts as high as 30 mph.
Monday
A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 74. West southwest wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
Showers and thunderstorms likely before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 58. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 52. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 62. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 80%.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 47.
Friday
Partly sunny, with a high near 65.
Friday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 50.
Saturday
A chance of showers. Partly sunny, with a high near 63.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 52.
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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:
1:21 am CDT Apr 13, 2026
Forecast Valid:
2am CDT Apr 13, 2026-6pm CDT Apr 19, 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