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.

Mostly Cloudy

48°F

9°C

Humidity 50%
Wind Speed W 13 G 24 mph
Barometer 29.88 in (1011.6 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 18 Apr 2:51 pm CDT
Extended Forecast for

Zion IL

Freeze Watch April 20, 12:00am until April 20, 09:00am
Frost Advisory April 19, 12:00am until April 19, 09:00am
Click here for hazard details and duration
Freeze Watch
Frost Advisory

  • This Afternoon

    This Afternoon: Partly sunny, with a steady temperature around 46. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph.

    High: 46 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Patchy frost between 1am and 2am. Otherwise, mostly clear, with a low around 36. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: A slight chance of rain and snow showers before 8am, then a chance of rain showers. Partly sunny, with a high near 48. West southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 30%.

    High: 48 °F

    Slight Chance
    Rain/Snow
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Widespread frost, mainly after 4am. Otherwise, partly cloudy, with a low around 33. North northwest wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 15 mph.

    Low: 33 °F

    Partly Cloudy
    then Frost

  • Monday

    Monday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 47. Southeast wind 5 to 10 mph.

    High: 47 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a steady temperature around 46. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph.
Tonight
Patchy frost between 1am and 2am. Otherwise, mostly clear, with a low around 36. West wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
A slight chance of rain and snow showers before 8am, then a chance of rain showers. Partly sunny, with a high near 48. West southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Sunday Night
Widespread frost, mainly after 4am. Otherwise, partly cloudy, with a low around 33. North northwest wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 15 mph.
Monday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 47. Southeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Mostly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 56.
Friday
A chance of showers. Mostly cloudy, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
2:46 pm CDT Apr 18, 2026
Forecast Valid:
3pm CDT Apr 18, 2026-6pm CDT Apr 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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