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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 5:51 pm CST Dec 13, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Mostly Clear on Tonight Sunny on Sunday Partly Sunny on Monday Partly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of rain on Thursday Partly Sunny on Friday Mostly Cloudy on Saturday
Low: -2°F High: 10°F High: 25°F High: 36°F High: 40°F High: 47°F High: 31°F High: 42°F
Low: 1 °F Low: 15°F Low: 30°F Low: 33°F Low: 17°F Low: 24°F  
Mostly Clear Sunny Partly Sunny Partly Sunny Partly Sunny Rain Partly Sunny Mostly Cloudy
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Current Conditions at
JOLIET - (KJOT)
10°
Clear
as of 6:55 PM CST
Rel. Humidity: 60%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.34 in.
Flight Rule: VFR
Wind Data
5 MPH
310° Northwest
Cloud Level(s): Clear
Current Conditions at
ROMEOVILLE WFO - (KLOT)
7°
Feels like -11°F
Mostly Cloudy
as of 6:56 PM CST
Rel. Humidity: 65%
Dew Point: -2°F
Visibility: 10 Miles
Pressure: 30.32 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 22 MPH
290° West
Cloud Level(s): Broken at 11000ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
9°
Feels like -7°F
Clear
as of 6:55 PM CST
Rel. Humidity: 65%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
13 MPH
310° Northwest
Cloud Level(s): Clear
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
9°
Feels like -8°F
Mostly Cloudy
as of 6:53 PM CST
Rel. Humidity: 55%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
15 MPH
320° Northwest
Cloud Level(s): Few at 11000ft, Broken at 15000ft
Mostly Clear on Tonight Tonight... Mostly clear, with a low around -2. Wind chill values as low as -18. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunny on Sunday Sunday... Sunny and cold, with a high near 10. Wind chill values as low as -18. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 1. Wind chill values as low as -13. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Partly Sunny on Monday Monday... Partly sunny, with a high near 25. Wind chill values as low as -12. West southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 15. West southwest wind around 5 mph becoming calm. Winds could gust as high as 15 mph.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 36.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 30.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 40.
20% chance of rain Wednesday Night Wednesday Night... A chance of showers after midnight. Cloudy, with a low around 33.
20% chance of rain Thursday Thursday... A chance of showers before noon. Mostly cloudy, with a high near 47. Breezy.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 17.
Partly Sunny on Friday Friday... Partly sunny, with a high near 31.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 24.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 42.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:10 AM
Sunset: 4:23 PM
Civil Sunrise:06:39 AM
Civil Sunset: 4:54 PM
Nautical Sunrise: 06:04 AM
Nautical Sunset: 5:29 PM
Astro Sunrise: 05:30 AM
Astro Sunset: 6:03 PM
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