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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 10:26 am CST Jan 11, 2026 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Cloudy on Today Mostly Cloudy on Tonight Mostly Sunny on Monday 20% chance of  on Tuesday 60% chance of snow on Wednesday Partly Sunny on Thursday 20% chance of snow on Friday Partly Sunny on Saturday
High: 33°F Low: 26°F High: 41°F High: 49°F High: 35°F High: 28°F High: 33°F High: 26°F
Low: 32°F Low: 32°F Low: 17°F Low: 22°F Low: 19°F  
Cloudy Mostly Cloudy Mostly Sunny Partly Sunny Snow Partly Sunny Snow Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
32°
Cloudy
as of 11:15 AM CST
Rel. Humidity: 68%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: MVFR
Wind Data
6 MPH
320° Northwest
Cloud Level(s): Solid Overcast at 2700ft
Current Conditions at
ROMEOVILLE WFO - (KLOT)
30°
Feels like 21°F
Cloudy
as of 10:45 AM CST
Rel. Humidity: 68%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: MVFR
Wind Data
9 MPH
Gust: 20 MPH
300° Northwest
Cloud Level(s): Solid Overcast at 2600ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
32°
Feels like 23°F
Cloudy
as of 11:15 AM CST
Rel. Humidity: 63%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: MVFR
Wind Data
10 MPH
Gust: 20 MPH
330° Northwest
Cloud Level(s): Solid Overcast at 2600ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
30°
Feels like 21°F
Cloudy
as of 10:53 AM CST
Rel. Humidity: 63%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.35 in.
Flight Rule: MVFR
Wind Data
10 MPH
Gust: 23 MPH
330° Northwest
Cloud Level(s): Solid Overcast at 2800ft
Cloudy on Today Today... Cloudy, with a high near 33. West northwest wind 10 to 15 mph, with gusts as high as 30 mph.

Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 26. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 41. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.

Increasing Clouds on Monday Night Monday Night... Increasing clouds, with a low around 32. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

20% chance of  Tuesday Tuesday... A 20 percent chance of showers before 3pm. Partly sunny, with a high near 49. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

20% chance of rain & snow Tuesday Night Tuesday Night... A slight chance of rain and snow showers after 3am. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.

60% chance of snow Wednesday Wednesday... Snow showers likely, mainly after noon. Mostly cloudy, with a high near 35. Chance of precipitation is 60%.

20% chance of snow Wednesday Night Wednesday Night... A chance of snow showers. Mostly cloudy, with a low around 17.

Partly Sunny on Thursday Thursday... Partly sunny, with a high near 28.

20% chance of snow Thursday Night Thursday Night... A chance of snow. Mostly cloudy, with a low around 22.

20% chance of snow Friday Friday... A chance of snow showers. Mostly cloudy, with a high near 33.

20% chance of snow Friday Night Friday Night... A chance of snow showers. Mostly cloudy, with a low around 19.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 26.

Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:18 AM
Sunset: 4:43 PM
Civil Sunrise:06:47 AM
Civil Sunset: 5:13 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 5:48 PM
Astro Sunrise: 05:39 AM
Astro Sunset: 6:21 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.