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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 pm CST Nov 20, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Friday Saturday Sunday Monday Tuesday Wednesday
Cloudy on This Afternoon Patchy Fog on Tonight 20% chance of rain on Friday Sunny on Saturday Sunny on Sunday 20% chance of rain on Monday 20% chance of rain on Tuesday Partly Sunny on Wednesday
High: 48°F Low: 44°F High: 50°F High: 50°F High: 57°F High: 55°F High: 56°F High: 42°F
Low: 33°F Low: 36°F Low: 37°F Low: 46°F Low: 34°F  
Cloudy Patchy Fog Rain Sunny Sunny Rain Rain Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
48°
Cloudy
as of 1:35 PM CST
Rel. Humidity: 87%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: MVFR
Wind Data
5 MPH
200° South
Cloud Level(s): Solid Overcast at 1200ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
48°
Cloudy
as of 1:35 PM CST
Rel. Humidity: 87%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: MVFR
Wind Data
6 MPH
210° Southwest
Cloud Level(s): Solid Overcast at 1200ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
46°
Cloudy
as of 12:53 PM CST
Rel. Humidity: 87%
Dew Point: 43°F
Visibility: 8 Miles
Pressure: 30.05 in.
Flight Rule: MVFR
Wind Data
7 MPH
190° South
Cloud Level(s): Solid Overcast at 1400ft
Cloudy on This Afternoon This Afternoon... Patchy drizzle after 2pm. Cloudy, with a high near 48. Southwest wind around 5 mph, with gusts as high as 15 mph.
Patchy Fog on Tonight Tonight... Patchy drizzle before 3am. Patchy fog after midnight. Otherwise, cloudy, with a low around 44. South southwest wind around 5 mph becoming north after midnight. Winds could gust as high as 10 mph.
20% chance of rain Friday Friday... A 20 percent chance of rain after noon. Patchy fog before 9am. Otherwise, cloudy, with a high near 50. North wind 5 to 10 mph.
20% chance of rain Friday Night Friday Night... A 20 percent chance of rain before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 33. North wind around 5 mph, with gusts as high as 10 mph.
Sunny on Saturday Saturday... Sunny, with a high near 50. North wind around 5 mph becoming southwest in the afternoon. Winds could gust as high as 10 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 36.
Sunny on Sunday Sunday... Sunny, with a high near 57.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 37.
20% chance of rain Monday Monday... A chance of rain after noon. Mostly cloudy, with a high near 55.
Rain on Monday Night Monday Night... Rain. Cloudy, with a low around 46.
20% chance of rain Tuesday Tuesday... A chance of rain. Mostly cloudy, with a high near 56.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 34.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 42.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 06:47 AM
Sunset: 4:28 PM
Civil Sunrise:06:17 AM
Civil Sunset: 4:58 PM
Nautical Sunrise: 05:43 AM
Nautical Sunset: 5:32 PM
Astro Sunrise: 05:10 AM
Astro Sunset: 6:05 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.