Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 2:56 am CDT Sep 16, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Overnight Sunny on Tuesday Sunny on Wednesday Sunny on Thursday Partly Sunny on Friday 20% chance of on Saturday 20% chance of on Sunday 20% chance of on Monday
Low: 61°F High: 83°F High: 86°F High: 88°F High: 85°F High: 79°F High: 79°F High: 82°F
Low: 59°F Low: 60°F Low: 63°F Low: 63°F Low: 62°F Low: 64°F  
Mostly Clear Sunny Sunny Sunny Partly Sunny Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
JOLIET - (KJOT)
61°
Clear
as of 2:35 AM CDST
Rel. Humidity: 100%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
ROMEOVILLE WFO - (KLOT)
63°
Clear
as of 2:35 AM CDST
Rel. Humidity: 100%
Dew Point: 63°F
Visibility: 9 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
5 MPH
050° Northeast
Cloud Level(s): Clear
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
61°
Clear
as of 2:35 AM CDST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
3 MPH
040° Northeast
Cloud Level(s): Clear
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
66°
Clear
as of 1:53 AM CDST
Rel. Humidity: 77%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a steady temperature around 61. East wind around 5 mph.
Sunny on Tuesday Tuesday... Sunny, with a high near 83. East northeast wind 5 to 10 mph.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 59. East northeast wind around 5 mph, with gusts as high as 10 mph.
Sunny on Wednesday Wednesday... Sunny, with a high near 86. Calm wind becoming east northeast around 5 mph in the afternoon.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 60. East northeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.
Sunny on Thursday Thursday... Sunny, with a high near 88.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 63.
Partly Sunny on Friday Friday... Partly sunny, with a high near 85.
20% chance of rain Friday Night Friday Night... A chance of showers after 1am. Mostly cloudy, with a low around 63.
20% chance of Saturday Saturday... A chance of showers. Partly sunny, with a high near 79.
20% chance of rain Saturday Night Saturday Night... A chance of showers. Mostly cloudy, with a low around 62.
20% chance of Sunday Sunday... A chance of showers. Partly sunny, with a high near 79.
20% chance of rain Sunday Night Sunday Night... A chance of showers. Mostly cloudy, with a low around 64.
20% chance of Monday Monday... A chance of showers. Partly sunny, with a high near 82.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 06:34 AM
Sunset: 6:59 PM
Civil Sunrise:06:06 AM
Civil Sunset: 7:27 PM
Nautical Sunrise: 05:34 AM
Nautical Sunset: 8:00 PM
Astro Sunrise: 05:00 AM
Astro Sunset: 8:33 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.