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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 1:41 am CST Jan 19, 2026 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

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Overnight M.L.King Day Tuesday Wednesday Thursday Friday Saturday Sunday
50% chance of blowing snow on Overnight 20% chance of blowing snow on M.L.King Day Increasing Clouds on Tuesday 20% chance of snow on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday
Low: 2 °F High: 9 °F High: 24°F High: 31°F High: 21°F High: 9°F High: 7°F High: 15°F
Low: 4 °F Low: 18°F Low: 13°F Low: 2°F Low: -8°F Low: -2°F  
Blowing Snow Blowing Snow Increasing Clouds Snow Mostly Sunny Partly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
JOLIET - (KJOT)
16°
Feels like 3°F
Cloudy
Light Snow
as of 1:55 AM CST
Rel. Humidity: 72%
Dew Point: 9°F
Visibility: 4 Miles
Pressure: 29.92 in.
Flight Rule: MVFR
Wind Data
10 MPH
Gust: 25 MPH
290° West
Cloud Level(s): Broken at 1900ft, Broken at 2500ft, Solid Overcast at 3000ft
Current Conditions at
ROMEOVILLE WFO - (KLOT)
14°
Feels like -3°F
Cloudy
Light Snow Mist
as of 1:55 AM CST
Rel. Humidity: 85%
Dew Point: 10°F
Visibility: 1 Miles
Pressure: 29.90 in.
Flight Rule: IFR
Wind Data
20 MPH
270° West
Cloud Level(s): Scattered at 500ft, Solid Overcast at 1200ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
14°
Feels like -5°F
Cloudy
as of 1:55 AM CST
Rel. Humidity: 66%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: MVFR
Wind Data
25 MPH
Gust: 35 MPH
290° West
Cloud Level(s): Scattered at 1400ft, Broken at 2000ft, Solid Overcast at 6000ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
16°
Feels like -1°F
Clear
Light Snow Blowing Snow
as of 1:53 AM CST
Rel. Humidity: 85%
Dew Point: 12°F
Visibility: 3/4 Miles
Pressure: 29.86 in.
Flight Rule: MVFR
Wind Data
22 MPH
Gust: 31 MPH
280° West
50% chance of blowing snow Overnight Overnight... A 50 percent chance of snow, mainly before 5am. Widespread blowing snow, mainly before 3am. Cloudy, with a low around 2. Wind chill values as low as -15. Blustery, with a west northwest wind around 25 mph, with gusts as high as 40 mph.
20% chance of blowing snow M.L.King Day M.L.King Day... A slight chance of snow before 8am, then a chance of flurries between 8am and noon. Patchy blowing snow before noon. Partly sunny and cold, with a high near 9. Wind chill values as low as -20. Blustery, with a west northwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 20%.
Mostly Clear on Monday Night Monday Night... Mostly cloudy, then gradually becoming mostly clear, with a low around 4. Wind chill values as low as -10. West wind 5 to 15 mph, with gusts as high as 20 mph.
Increasing Clouds on Tuesday Tuesday... Increasing clouds, with a high near 24. Wind chill values as low as -7. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
60% chance of snow Tuesday Night Tuesday Night... Snow likely, mainly after midnight. Cloudy, with a low around 18. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
20% chance of snow Wednesday Wednesday... A 20 percent chance of snow before noon. Partly sunny, with a high near 31.
20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 13.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 21.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 2.
Partly Sunny on Friday Friday... Partly sunny and cold, with a high near 9.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -8.
Mostly Sunny on Saturday Saturday... Mostly sunny and cold, with a high near 7.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around -2.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 15.
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
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