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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 12:21 pm CST Dec 24, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Christmas Day Friday Saturday Sunday Monday Tuesday
Mostly Cloudy on This Afternoon Patchy Fog on Tonight Cloudy on Christmas Day 40% chance of rain on Friday Mostly Cloudy on Saturday Partly Sunny on Sunday Sunny on Monday Partly Sunny on Tuesday
High: 46°F Low: 40°F High: 43°F High: 48°F High: 50°F High: 43°F High: 21°F High: 26°F
Low: 39°F Low: 38°F Low: 38°F Low: 12°F Low: 12°F  
Mostly Cloudy Patchy Fog Cloudy Rain Mostly Cloudy Partly Sunny Sunny Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
45°
Feels like 39°F
Clear
as of 12:35 PM CST
Rel. Humidity: 70%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
9 MPH
130° Southeast
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
45°
Clear
as of 12:35 PM CST
Rel. Humidity: 75%
Dew Point: 37°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
7 MPH
140° Southeast
Cloud Level(s): Clear
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
43°
Feels like 37°F
Mostly Cloudy
as of 11:53 AM CST
Rel. Humidity: 56%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.23 in.
Flight Rule: VFR
Wind Data
9 MPH
150° Southeast
Cloud Level(s): Broken at 23000ft
Mostly Cloudy on This Afternoon This Afternoon... Drizzle, mainly after 5pm. Mostly cloudy, with a high near 46. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Patchy Fog on Tonight Tonight... Drizzle, mainly before 11pm. Patchy fog after 9pm. Otherwise, cloudy, with a low around 40. Southeast wind 5 to 10 mph becoming north in the evening. Winds could gust as high as 15 mph.

Cloudy on Christmas Day Christmas Day... Cloudy, with a high near 43. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.

70% chance of rain Thursday Night Thursday Night... Rain likely, mainly after midnight. Cloudy, with a low around 39. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

40% chance of rain Friday Friday... A 40 percent chance of rain before noon. Mostly cloudy, with a high near 48. Southeast wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 15 mph.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 38.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 50.

Cloudy on Saturday Night Saturday Night... Cloudy, with a low around 38.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 43. Breezy.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 12. Blustery.

Sunny on Monday Monday... Sunny, with a high near 21. Blustery.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 12.

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

Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:17 AM
Sunset: 4:27 PM
Civil Sunrise:06:45 AM
Civil Sunset: 4:59 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:33 PM
Astro Sunrise: 05:37 AM
Astro Sunset: 6:07 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.