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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 3:11 pm CST Jan 23, 2026 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Saturday Sunday Monday Tuesday Wednesday Thursday
Sunny on This Afternoon Mostly Cloudy on Tonight 20% chance of snow on Saturday 80% chance of snow on Sunday Mostly Sunny on Monday Partly Sunny on Tuesday Partly Sunny on Wednesday Mostly Sunny on Thursday
High: 0 °F Low: -7°F High: 10°F High: 18°F High: 10°F High: 20°F High: 14°F High: 14°F
Low: 8 °F Low: 2°F Low: 4°F Low: 3°F Low: 2°F  
Sunny Mostly Cloudy Snow Snow Mostly Sunny Partly Sunny Partly Sunny Mostly Sunny
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Current Conditions at
JOLIET - (KJOT)
-0°
Clear
as of 3:15 PM CST
Rel. Humidity: 37%
Dew Point: -20°F
Visibility: 10 Miles
Pressure: 30.72 in.
Flight Rule: VFR
Wind Data
8 MPH
Gust: 16 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
ROMEOVILLE WFO - (KLOT)
-2°
Clear
as of 2:55 PM CST
Rel. Humidity: 37%
Dew Point: -22°F
Visibility: 10 Miles
Pressure: 30.71 in.
Flight Rule: VFR
Wind Data
6 MPH
Gust: 15 MPH
330° Northwest
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
-0°
Feels like -16°F
Clear
as of 3:15 PM CST
Rel. Humidity: 33%
Dew Point: -22°F
Visibility: 10 Miles
Pressure: 30.72 in.
Flight Rule: VFR
Wind Data
10 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
-2°
Feels like -22°F
Mostly Clear
as of 2:53 PM CST
Rel. Humidity: 33%
Dew Point: -24°F
Visibility: 10 Miles
Pressure: 30.69 in.
Flight Rule: VFR
Wind Data
15 MPH
310° Northwest
Cloud Level(s): Few at 2400ft, Few at 25000ft
Sunny on This Afternoon This Afternoon... Sunny and cold, with a high near 0. Wind chill values as low as -20. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.

Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around -7. Wind chill values as low as -21. North wind 5 to 10 mph.

20% chance of snow Saturday Saturday... A 20 percent chance of snow after noon. Cloudy and cold, with a high near 10. Wind chill values as low as -18. North northwest wind around 5 mph becoming east northeast in the afternoon.

80% chance of snow Saturday Night Saturday Night... Snow, mainly after 9pm. Low around 8. Wind chill values as low as -3. East northeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

80% chance of snow Sunday Sunday... Snow. High near 18. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

30% chance of snow Sunday Night Sunday Night... A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 2.

Mostly Sunny on Monday Monday... Mostly sunny and cold, with a high near 10.

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.

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

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 14.

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 14.

Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:11 AM
Sunset: 4:57 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:27 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 6:00 PM
Astro Sunrise: 05:35 AM
Astro Sunset: 6:33 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.