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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 4:21 pm CST Nov 15, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Mostly Clear on Tonight Sunny on Sunday Increasing Clouds on Monday 50% chance of rain on Tuesday Mostly Cloudy on Wednesday 70% chance of rain on Thursday 70% chance of rain on Friday Partly Sunny on Saturday
Low: 35°F High: 49°F High: 48°F High: 47°F High: 49°F High: 55°F High: 56°F High: 49°F
Low: 28°F Low: 38°F Low: 36°F Low: 40°F Low: 46°F Low: 39°F  
Mostly Clear Sunny Increasing Clouds Rain Mostly Cloudy Rain Rain Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
66°
Clear
as of 4:35 PM CST
Rel. Humidity: 45%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 29.59 in.
Flight Rule: VFR
Wind Data
7 MPH
Gust: 17 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
64°
Clear
as of 4:35 PM CST
Rel. Humidity: 52%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 29.59 in.
Flight Rule: VFR
Wind Data
13 MPH
310° Northwest
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 35. Northwest wind around 15 mph, with gusts as high as 25 mph.

Sunny on Sunday Sunday... Sunny, with a high near 49. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 28. West northwest wind 5 to 10 mph becoming light after midnight.

Increasing Clouds on Monday Monday... Increasing clouds, with a high near 48. Calm wind becoming southeast around 5 mph in the afternoon.

70% chance of rain Monday Night Monday Night... Rain likely, mainly after midnight. Cloudy, with a low around 38. East southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.

50% chance of rain Tuesday Tuesday... A 50 percent chance of rain, mainly before noon. Cloudy, with a high near 47.

20% chance of rain Tuesday Night Tuesday Night... A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 36.

Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 49.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 40.

70% chance of rain Thursday Thursday... Rain likely, mainly after noon. Mostly cloudy, with a high near 55.

70% chance of rain Thursday Night Thursday Night... Rain likely. Mostly cloudy, with a low around 46.

70% chance of rain Friday Friday... Rain likely. Mostly cloudy, with a high near 56.

20% chance of rain Friday Night Friday Night... A chance of rain. Mostly cloudy, with a low around 39.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 49.

Sun Almanac for Union, Illinois
Sunrise: 06:41 AM
Sunset: 4:32 PM
Civil Sunrise:06:12 AM
Civil Sunset: 5:02 PM
Nautical Sunrise: 05:38 AM
Nautical Sunset: 5:35 PM
Astro Sunrise: 05:05 AM
Astro Sunset: 6:08 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.