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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 6:21 am CST Dec 14, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

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Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Sunny on Today Cloudy on Tonight Partly Sunny on Monday Partly Sunny on Tuesday Mostly Sunny on Wednesday 70% chance of rain on Thursday Partly Sunny on Friday 20% chance of rain on Saturday
High: 9 °F Low: 2 °F High: 25°F High: 37°F High: 39°F High: 48°F High: 32°F High: 44°F
Low: 15°F Low: 30°F Low: 32°F Low: 16°F Low: 25°F  
Sunny Cloudy Partly Sunny Partly Sunny Mostly Sunny Rain Partly Sunny Rain
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Current Conditions at
JOLIET - (KJOT)
-0°
Clear
as of 7:15 AM CST
Rel. Humidity: 64%
Dew Point: -9°F
Visibility: 10 Miles
Pressure: 30.59 in.
Flight Rule: VFR
Wind Data
7 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
ROMEOVILLE WFO - (KLOT)
-2°
Feels like -18°F
Clear
as of 6:45 AM CST
Rel. Humidity: 64%
Dew Point: -11°F
Visibility: 10 Miles
Pressure: 30.55 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 23 MPH
310° Northwest
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
-2°
Feels like -18°F
Clear
as of 7:15 AM CST
Rel. Humidity: 70%
Dew Point: -9°F
Visibility: 10 Miles
Pressure: 30.58 in.
Flight Rule: VFR
Wind Data
10 MPH
330° Northwest
Cloud Level(s): Clear
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
-0°
Feels like -19°F
Mostly Clear
as of 6:53 AM CST
Rel. Humidity: 59%
Dew Point: -11°F
Visibility: 10 Miles
Pressure: 30.54 in.
Flight Rule: VFR
Wind Data
14 MPH
320° Northwest
Cloud Level(s): Few at 1500ft
Sunny on Today Today... Sunny and cold, with a high near 9. Wind chill values as low as -21. West wind 10 to 15 mph, with gusts as high as 20 mph.
Cloudy on Tonight Tonight... Partly cloudy, with a low around 2. Wind chill values as low as -12. 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 -11. Breezy, with a west southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 15. 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 37. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 30.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 39.
20% chance of rain Wednesday Night Wednesday Night... A chance of rain after midnight. Mostly cloudy, with a low around 32. Breezy.
70% chance of rain Thursday Thursday... Rain likely before noon. Mostly cloudy, with a high near 48. Breezy.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 16.
Partly Sunny on Friday Friday... Partly sunny, with a high near 32.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 25.
20% chance of rain Saturday Saturday... A chance of rain. Mostly cloudy, with a high near 44.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:11 AM
Sunset: 4:23 PM
Civil Sunrise:06:40 AM
Civil Sunset: 4:54 PM
Nautical Sunrise: 06:05 AM
Nautical Sunset: 5:29 PM
Astro Sunrise: 05:31 AM
Astro Sunset: 6:03 PM
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