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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 11:36 pm CST Jan 14, 2026 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday M.L.King Day Tuesday Wednesday
Cloudy on Overnight Increasing Clouds on Thursday 50% chance of snow on Friday 30% chance of snow on Saturday Partly Sunny on Sunday Partly Sunny on M.L.King Day Mostly Sunny on Tuesday Partly Sunny on Wednesday
Low: 14°F High: 25°F High: 36°F High: 18°F High: 17°F High: 14°F High: 18°F High: 26°F
Low: 28 °F Low: 14°F Low: 6°F Low: 7°F Low: 2°F Low: 11°F  
Cloudy Increasing Clouds Snow Snow Partly Sunny Partly Sunny Mostly Sunny Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
19°
Feels like 6°F
Cloudy
as of 11:35 PM CST
Rel. Humidity: 62%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
13 MPH
Gust: 18 MPH
330° Northwest
Cloud Level(s): Solid Overcast at 3400ft
Current Conditions at
ROMEOVILLE WFO - (KLOT)
18°
Feels like 1°F
Cloudy
as of 11:35 PM CST
Rel. Humidity: 67%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
18 MPH
330° Northwest
Cloud Level(s): Solid Overcast at 3200ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
19°
Cloudy
as of 11:35 PM CST
Rel. Humidity: 57%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
8 MPH
Gust: 21 MPH
350° North
Cloud Level(s): Solid Overcast at 3200ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
19°
Feels like 4°F
Cloudy
as of 10:53 PM CST
Rel. Humidity: 57%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.00 in.
Flight Rule: VFR
Wind Data
17 MPH
340° North
Cloud Level(s): Solid Overcast at 3700ft
Cloudy on Overnight Overnight... Partly cloudy, with a low around 14. Wind chill values as low as zero. North northwest wind around 15 mph, with gusts as high as 25 mph.

Increasing Clouds on Thursday Thursday... Increasing clouds, with a high near 25. Wind chill values as low as zero. North northwest wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

90% chance of snow Thursday Night Thursday Night... Snow. Temperature rising to around 28 by 4am. South southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

50% chance of snow Friday Friday... A 50 percent chance of snow showers. Mostly cloudy, with a high near 36. West wind around 15 mph, with gusts as high as 25 mph.

50% chance of snow Friday Night Friday Night... A 50 percent chance of snow. Mostly cloudy, with a low around 14. West wind 10 to 15 mph, with gusts as high as 20 mph.

30% chance of snow Saturday Saturday... A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 18.

20% chance of snow Saturday Night Saturday Night... A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 6.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 17.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 7.

Partly Sunny on M.L.King Day M.L.King Day... Partly sunny, with a high near 14.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 2.

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

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 11.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 26.

Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:16 AM
Sunset: 4:47 PM
Civil Sunrise:06:45 AM
Civil Sunset: 5:18 PM
Nautical Sunrise: 06:11 AM
Nautical Sunset: 5:52 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:25 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.