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.

Partly Cloudy

69°F

21°C

Humidity 47%
Wind Speed SW 16 G 32 mph
Barometer 29.75 in (1007.1 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 12 May 6:51 pm CDT
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Isolated showers and thunderstorms between 7pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 48. Breezy, with a southwest wind 10 to 20 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    Low: 48 °F

    Isolated
    T-storms and
    Breezy then
    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 56. North wind around 15 mph, with gusts as high as 25 mph.

    High: 56 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 41. North northeast wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 15 mph.

    Low: 41 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 57. Light and variable wind becoming east southeast 5 to 10 mph in the afternoon.

    High: 57 °F

    Sunny

  • Thursday Night

    Thursday Night: Scattered showers and thunderstorms after 1am. Mostly cloudy, with a low around 47. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 47 °F

    Partly Cloudy
    then
    Scattered
    Showers

  • Friday

    Friday: Scattered showers and thunderstorms before 1pm. Partly sunny, with a high near 76. Chance of precipitation is 30%.

    High: 76 °F

    Scattered
    Showers

  • Friday Night

    Friday Night: Isolated showers and thunderstorms. Mostly clear, with a low around 55. Chance of precipitation is 20%.

    Low: 55 °F

    Isolated
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Scattered
    T-storms

Detailed Forecast

Tonight
Isolated showers and thunderstorms between 7pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 48. Breezy, with a southwest wind 10 to 20 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 56. North wind around 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, then gradually becoming clear, with a low around 41. North northeast wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 15 mph.
Thursday
Sunny, with a high near 57. Light and variable wind becoming east southeast 5 to 10 mph in the afternoon.
Thursday Night
Scattered showers and thunderstorms after 1am. Mostly cloudy, with a low around 47. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Friday
Scattered showers and thunderstorms before 1pm. Partly sunny, with a high near 76. Chance of precipitation is 30%.
Friday Night
Isolated showers and thunderstorms. Mostly clear, with a low around 55. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 81.
Saturday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 52.
Sunday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 74.
Sunday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 57.
Monday
Showers and thunderstorms likely. Mostly cloudy, with a high near 82.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 55.
Tuesday
Scattered showers and thunderstorms. Partly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
6:41 pm CDT May 12, 2026
Forecast Valid:
6pm CDT May 12, 2026-6pm CDT May 19, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation