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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 1:50 pm CST Jan 19, 2026 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

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M.L.King Day Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Blowing Snow on M.L.King Day Clearing on Tonight Sunny on Tuesday 20% chance of snow on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday
High: 8 °F Low: 1 °F High: 23°F High: 31°F High: 22°F High: 1°F High: 6°F High: 13°F
  Low: 18°F Low: 14°F Low: -4°F Low: -8°F Low: -4°F  
Blowing Snow Clearing Sunny Snow Mostly Sunny Partly Sunny Partly Sunny Mostly Sunny
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Current Conditions at
JOLIET - (KJOT)
10°
Feels like -5°F
Cloudy
as of 1:55 PM CST
Rel. Humidity: 55%
Dew Point: -2°F
Visibility: 10 Miles
Pressure: 30.28 in.
Flight Rule: MVFR
Wind Data
14 MPH
Gust: 21 MPH
280° West
Cloud Level(s): Solid Overcast at 2300ft
Current Conditions at
ROMEOVILLE WFO - (KLOT)
Feels like -13°F
Mostly Cloudy
as of 1:50 PM CST
Rel. Humidity: 60%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.27 in.
Flight Rule: MVFR
Wind Data
22 MPH
Gust: 30 MPH
260° West
Cloud Level(s): Broken at 2100ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
10°
Feels like -9°F
Mostly Cloudy
as of 1:55 PM CST
Rel. Humidity: 51%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.27 in.
Flight Rule: MVFR
Wind Data
22 MPH
Gust: 30 MPH
290° West
Cloud Level(s): Broken at 2300ft, Broken at 2800ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
Feels like -13°F
Partly Cloudy
as of 1:53 PM CST
Rel. Humidity: 54%
Dew Point: -8°F
Visibility: 10 Miles
Pressure: 30.25 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 25 MPH
280° West
Cloud Level(s): Few at 1800ft, Scattered at 2300ft
Blowing Snow on M.L.King Day M.L.King Day... Patchy blowing snow. Mostly sunny and cold, with a high near 8. Wind chill values as low as -12. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

Clearing on Tonight Tonight... Cloudy during the early evening, then gradual clearing, with a low around 1. Wind chill values as low as -11. West wind 5 to 15 mph, with gusts as high as 20 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 23. Wind chill values as low as -12. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

60% chance of snow Tuesday Night Tuesday Night... Snow likely, mainly after midnight. Cloudy, with a low around 18. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

20% chance of snow Wednesday Wednesday... A 20 percent chance of snow before noon. Partly sunny, with a high near 31. West wind 10 to 15 mph, with gusts as high as 25 mph.

30% chance of snow Wednesday Night Wednesday Night... A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 14.

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

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around -4.

Partly Sunny on Friday Friday... Partly sunny and cold, with a high near 1.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -8.

Partly Sunny on Saturday Saturday... Partly sunny and cold, with a high near 6.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around -4.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 13.

Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:14 AM
Sunset: 4:52 PM
Civil Sunrise:06:44 AM
Civil Sunset: 5:22 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:56 PM
Astro Sunrise: 05:37 AM
Astro Sunset: 6:29 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.