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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 3:06 pm CST Nov 29, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

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Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
100% chance of blowing snow on Tonight 40% chance of snow on Sunday 50% chance of snow on Monday Partly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Thursday Mostly Cloudy on Friday Mostly Cloudy on Saturday
Low: 26°F High: 30°F High: 25°F High: 22°F High: 30°F High: 19°F High: 26°F High: 30°F
Low: 11°F Low: 15°F Low: 15°F Low: 8°F Low: 3°F Low: 15°F  
Blowing Snow Snow Snow Partly Sunny Mostly Cloudy Mostly Sunny Mostly Cloudy Mostly Cloudy
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Current Conditions at
JOLIET - (KJOT)
30°
Feels like 19°F
Cloudy
Light Snow
as of 6:15 PM CST
Rel. Humidity: 100%
Dew Point: 30°F
Visibility: 1 3/4 Miles
Pressure: 29.95 in.
Flight Rule: IFR
Wind Data
14 MPH
Gust: 18 MPH
130° Southeast
Cloud Level(s): Solid Overcast at 700ft
Current Conditions at
ROMEOVILLE WFO - (KLOT)
28°
Feels like 16°F
Mostly Cloudy
Light Snow
as of 5:55 PM CST
Rel. Humidity: 92%
Dew Point: 27°F
Visibility: 1 Miles
Pressure: 29.96 in.
Flight Rule: LIFR
Wind Data
17 MPH
Gust: 24 MPH
120° Southeast
Cloud Level(s): Broken at 200ft, Broken at 800ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
30°
Feels like 18°F
Cloudy
Light Snow
as of 6:15 PM CST
Rel. Humidity: 100%
Dew Point: 30°F
Visibility: 1 1/2 Miles
Pressure: 29.92 in.
Flight Rule: IFR
Wind Data
16 MPH
Gust: 21 MPH
140° Southeast
Cloud Level(s): Solid Overcast at 700ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
28°
Feels like 17°F
Cloudy
Light Snow Mist
as of 6:04 PM CST
Rel. Humidity: 92%
Dew Point: 27°F
Visibility: 3 Miles
Pressure: 29.97 in.
Flight Rule: IFR
Wind Data
15 MPH
130° Southeast
Cloud Level(s): Broken at 900ft, Broken at 1300ft, Solid Overcast at 3900ft
100% chance of blowing snow Tonight Tonight... Snow, possibly mixed with rain, becoming all snow after 2am. Patchy blowing snow before 7pm. Low around 26. Breezy, with a southeast wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 3 inches possible.
40% chance of snow Sunday Sunday... A 40 percent chance of snow showers before 9am. Cloudy, with a high near 30. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 11. West northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.
50% chance of snow Monday Monday... A 50 percent chance of snow after noon. Cloudy, with a high near 25. Calm wind becoming south southwest around 5 mph.
70% chance of snow Monday Night Monday Night... Snow likely, mainly before midnight. Cloudy, with a low around 15. Calm wind becoming northwest around 5 mph after midnight. Chance of precipitation is 70%.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 22.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 15.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 30.
20% chance of snow Wednesday Night Wednesday Night... A chance of snow before midnight. Mostly cloudy, with a low around 8.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 19.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 3.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 26.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 15.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 30.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 06:57 AM
Sunset: 4:24 PM
Civil Sunrise:06:27 AM
Civil Sunset: 4:54 PM
Nautical Sunrise: 05:52 AM
Nautical Sunset: 5:29 PM
Astro Sunrise: 05:19 AM
Astro Sunset: 6:02 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.