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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 10:36 am CST Jan 12, 2026 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Sunny on Today Increasing Clouds on Tonight 10% chance of on Tuesday 60% chance of snow on Wednesday Mostly Sunny on Thursday Snow on Friday 20% chance of snow on Saturday Partly Sunny on Sunday
High: 43°F Low: 32°F High: 48°F High: 36°F High: 26°F High: 33°F High: 22°F High: 18°F
Low: 34°F Low: 16°F Low: 20°F Low: 19°F Low: 6°F  
Sunny Increasing Clouds Partly Sunny Snow Mostly Sunny Snow Snow Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
36°
Clear
as of 10:15 AM CST
Rel. Humidity: 64%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
8 MPH
230° Southwest
Cloud Level(s): Clear
Current Conditions at
ROMEOVILLE WFO - (KLOT)
32°
Feels like 22°F
Clear
as of 9:45 AM CST
Rel. Humidity: 63%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 20 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
36°
Feels like 27°F
Clear
as of 10:15 AM CST
Rel. Humidity: 59%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
13 MPH
Gust: 18 MPH
240° Southwest
Cloud Level(s): Clear
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
34°
Feels like 23°F
Mostly Cloudy
as of 9:53 AM CST
Rel. Humidity: 55%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
15 MPH
240° Southwest
Cloud Level(s): Scattered at 17000ft, Broken at 25000ft
Sunny on Today Today... Sunny, with a high near 43. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 32. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
10% chance of Tuesday Tuesday... A slight chance of sprinkles after noon. Partly sunny, with a high near 48. West southwest wind around 15 mph, with gusts as high as 25 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 34. West wind 10 to 15 mph, with gusts as high as 25 mph.
60% chance of snow Wednesday Wednesday... Snow showers likely, mainly before noon. Mostly cloudy, with a high near 36. Breezy, with a north wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%.
30% chance of snow Wednesday Night Wednesday Night... A 30 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 16. Blustery.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 26.
20% chance of snow Thursday Night Thursday Night... A chance of snow. Mostly cloudy, with a low around 20.
Snow on Friday Friday... Scattered snow showers. Cloudy, with a high near 33.
Snow on Friday Night Friday Night... Scattered snow showers. Mostly cloudy, with a low around 19.
20% chance of snow Saturday Saturday... A chance of snow showers. Mostly cloudy, with a high near 22.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 6.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 18.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:17 AM
Sunset: 4:44 PM
Civil Sunrise:06:46 AM
Civil Sunset: 5:15 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 5:49 PM
Astro Sunrise: 05:39 AM
Astro Sunset: 6:22 PM
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