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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 2:26 pm CST Nov 24, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thanksgiving Day Friday Saturday Sunday
20% chance of rain on This Afternoon 80% chance of rain on Tonight 60% chance of rain on Tuesday 20% chance of snow on Wednesday Mostly Sunny on Thanksgiving Day Mostly Sunny on Friday Snow on Saturday 20% chance of rain on Sunday
High: 51°F Low: 45°F High: 52°F High: 38°F High: 33°F High: 32°F High: 34°F High: 36°F
Low: 34°F Low: 24°F Low: 19°F Low: 23°F Low: 27°F  
Rain Rain Rain Snow Mostly Sunny Mostly Sunny Snow Rain
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Current Conditions at
JOLIET - (KJOT)
50°
Cloudy
as of 2:35 PM CST
Rel. Humidity: 81%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
3 MPH
170° South
Cloud Level(s): Solid Overcast at 11000ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
48°
Cloudy
as of 2:35 PM CST
Rel. Humidity: 87%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
7 MPH
160° South
Cloud Level(s): Solid Overcast at 10000ft
20% chance of rain This Afternoon This Afternoon... A 20 percent chance of rain after 5pm. Cloudy, with a high near 51. South wind around 10 mph.

80% chance of rain Tonight Tonight... Rain, mainly after 2am. Patchy fog after 11pm. Low around 45. South southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

60% chance of rain Tuesday Tuesday... Rain likely before 9am, then a slight chance of drizzle between 9am and noon. Areas of fog before noon. Otherwise, cloudy, with a high near 52. Calm wind becoming west around 5 mph in the afternoon. Winds could gust as high as 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

70% chance of rain Tuesday Night Tuesday Night... Rain likely before midnight. Mostly cloudy, with a low around 34. Breezy, with a west wind 5 to 15 mph increasing to 15 to 25 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 70%.

20% chance of snow Wednesday Wednesday... A chance of flurries with a slight chance of snow before noon, then a chance of flurries after noon. Mostly cloudy, with a high near 38. Breezy, with a west wind around 25 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 24. Breezy.

Mostly Sunny on Thanksgiving Day Thanksgiving Day... Mostly sunny, with a high near 33. Breezy.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 19.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 32.

20% chance of snow Friday Night Friday Night... A chance of snow after midnight. Mostly cloudy, with a low around 23.

Snow on Saturday Saturday... Snow likely. Cloudy, with a high near 34.

20% chance of snow Saturday Night Saturday Night... A chance of snow. Cloudy, with a low around 27.

20% chance of rain Sunday Sunday... A chance of rain. Mostly cloudy, with a high near 36.

Sun Almanac for Union, Illinois
Sunrise: 06:52 AM
Sunset: 4:26 PM
Civil Sunrise:06:22 AM
Civil Sunset: 4:56 PM
Nautical Sunrise: 05:48 AM
Nautical Sunset: 5:30 PM
Astro Sunrise: 05:14 AM
Astro Sunset: 6:03 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.