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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 3:11 am CST Nov 28, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

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Today Tonight Saturday Sunday Monday Tuesday Wednesday Thursday
Sunny on Today 80% chance of snow on Tonight 100% chance of snow on Saturday 40% chance of snow on Sunday Mostly Cloudy on Monday Partly Sunny on Tuesday Mostly Cloudy on Wednesday Partly Sunny on Thursday
High: 32°F Low: 25°F High: 31°F High: 30°F High: 20°F High: 22°F High: 30°F High: 23°F
Low: 26°F Low: 7°F Low: 9°F Low: 13°F Low: 14°F  
Sunny Snow Snow Snow Mostly Cloudy Partly Sunny Mostly Cloudy Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
23°
Clear
as of 5:15 AM CST
Rel. Humidity: 79%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.36 in.
Flight Rule: VFR
Wind Data
5 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
ROMEOVILLE WFO - (KLOT)
21°
Feels like 10°F
Clear
as of 5:15 AM CST
Rel. Humidity: 79%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.35 in.
Flight Rule: VFR
Wind Data
9 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
21°
Feels like 10°F
Clear
as of 5:15 AM CST
Rel. Humidity: 85%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.35 in.
Flight Rule: VFR
Wind Data
10 MPH
290° West
Cloud Level(s): Clear
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
23°
Feels like 11°F
Clear
as of 4:53 AM CST
Rel. Humidity: 73%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.32 in.
Flight Rule: VFR
Wind Data
13 MPH
300° Northwest
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 32. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
80% chance of snow Tonight Tonight... Snow, mainly after 4am. Steady temperature around 25. Light and variable wind becoming southeast 5 to 10 mph after midnight. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
100% chance of snow Saturday Saturday... Snow. The snow could be heavy at times. High near 31. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
100% chance of snow Saturday Night Saturday Night... Snow. Low around 26. Southeast wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
40% chance of snow Sunday Sunday... A 40 percent chance of snow before noon. Mostly cloudy, with a high near 30. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 7.
Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 20.
20% chance of snow Monday Night Monday Night... A chance of snow before midnight. Mostly cloudy, with a low around 9.
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 13.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 30.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 14.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 23.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 06:56 AM
Sunset: 4:24 PM
Civil Sunrise:06:26 AM
Civil Sunset: 4:55 PM
Nautical Sunrise: 05:51 AM
Nautical Sunset: 5:29 PM
Astro Sunrise: 05:18 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.