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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 4:31 pm CST Jan 24, 2026 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
90% chance of snow on This Afternoon 90% chance of snow on Tonight 80% chance of snow on Sunday Sunny on Monday Partly Sunny on Tuesday 20% chance of snow on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday
High: 5 °F Low: 4 °F High: 16°F High: 10°F High: 20°F High: 15°F High: 15°F High: 18°F High: 22°F
Low: -2°F Low: 4°F Low: 3°F Low: 2°F Low: 3°F Low: 6°F  
Snow Snow Snow Sunny Partly Sunny Snow Mostly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
JOLIET - (KJOT)
Clear
Light Snow
as of 5:15 PM CST
Rel. Humidity: 77%
Dew Point: 1°F
Visibility: 3 Miles
Pressure: 30.55 in.
Flight Rule: MVFR
Wind Data
6 MPH
010° North
Current Conditions at
ROMEOVILLE WFO - (KLOT)
Cloudy
Light Snow Haze
as of 4:45 PM CST
Rel. Humidity: 77%
Dew Point: -0°F
Visibility: 2 Miles
Pressure: 30.55 in.
Flight Rule: IFR
Wind Data
6 MPH
040° Northeast
Cloud Level(s): Solid Overcast at 4200ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
Cloudy
Light Snow
as of 5:15 PM CST
Rel. Humidity: 77%
Dew Point: -0°F
Visibility: 1 1/2 Miles
Pressure: 30.53 in.
Flight Rule: IFR
Wind Data
3 MPH
050° Northeast
Cloud Level(s): Solid Overcast at 2000ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
Cloudy
Light Snow Mist
as of 4:53 PM CST
Rel. Humidity: 71%
Dew Point: -0°F
Visibility: 3 Miles
Pressure: 30.54 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 3800ft
90% chance of snow This Afternoon This Afternoon... Snow. Steady temperature around 5. Wind chill values as low as -7. East northeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 90%. Total daytime snow accumulation of less than a half inch possible.

90% chance of snow Tonight Tonight... Snow. Low around 4. Wind chill values as low as -9. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

80% chance of snow Sunday Sunday... Snow. High near 16. Wind chill values as low as -6. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around -2. Wind chill values as low as -18. Northwest wind around 15 mph, with gusts as high as 20 mph.

Sunny on Monday Monday... Sunny and cold, with a high near 10. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 4.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 20.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 3.

20% chance of snow Wednesday Wednesday... A chance of snow after noon. Partly sunny, with a high near 15.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 2.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 15.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 3.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 18.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 6.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 22.

Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:11 AM
Sunset: 4:58 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:28 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 6:01 PM
Astro Sunrise: 05:34 AM
Astro Sunset: 6:34 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.