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Union, Illinois Weather Forecast
Union, Illinois Weather
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Weather Forecast for Union, Illinois : Will County
Issued: 1:26 pm CST Dec 22, 2025 Latitude: 41.4969757 Longitude: -88.0233891 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Christmas Day Friday Saturday Sunday
20% chance of rain on This Afternoon 20% chance of rain on Tonight Partly Sunny on Tuesday 30% chance of rain on Wednesday Cloudy on Christmas Day Partly Sunny on Friday Mostly Cloudy on Saturday Mostly Sunny on Sunday
High: 43°F Low: 38°F High: 48°F High: 43°F High: 48°F High: 53°F High: 54°F High: 34°F
Low: 30°F Low: 41°F Low: 43°F Low: 38°F Low: 28°F  
Rain Rain Partly Sunny Rain Cloudy Partly Sunny Mostly Cloudy Mostly Sunny
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Current Conditions at
JOLIET - (KJOT)
45°
Cloudy
as of 12:55 PM CST
Rel. Humidity: 39%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
6 MPH
160° South
Cloud Level(s): Solid Overcast at 4300ft
Current Conditions at
ROMEOVILLE WFO - (KLOT)
43°
Feels like 36°F
Cloudy
as of 12:45 PM CST
Rel. Humidity: 45%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
10 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 4500ft
Current Conditions at
MORRIS MUNICIPAL AIRPORT - (KC09)
41°
Cloudy
as of 12:55 PM CST
Rel. Humidity: 56%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
8 MPH
170° South
Cloud Level(s): Solid Overcast at 4100ft
Current Conditions at
CHICAGO-MIDWAY - (KMDW)
43°
Feels like 36°F
Cloudy
as of 12:53 PM CST
Rel. Humidity: 33%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
10 MPH
180° South
Cloud Level(s): Solid Overcast at 5000ft
20% chance of rain This Afternoon This Afternoon... A 20 percent chance of rain after 4pm. Cloudy, with a high near 43. South wind 10 to 15 mph, with gusts as high as 20 mph.
20% chance of rain Tonight Tonight... A 20 percent chance of rain before 9pm. Cloudy, with a low around 38. South southwest wind around 10 mph.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 48. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 30. Northwest wind around 5 mph becoming calm.
30% chance of rain Wednesday Wednesday... A 30 percent chance of rain or drizzle after noon. Mostly cloudy, with a high near 43. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
60% chance of rain Wednesday Night Wednesday Night... Rain or drizzle likely, mainly before midnight. Patchy fog. Otherwise, cloudy, with a low around 41. Chance of precipitation is 60%.
Cloudy on Christmas Day Christmas Day... Cloudy, with a high near 48.
20% chance of rain Thursday Night Thursday Night... A chance of rain. Cloudy, with a low around 43.
Partly Sunny on Friday Friday... Partly sunny, with a high near 53.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 38.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 54.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 28.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 34. Breezy.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 07:16 AM
Sunset: 4:26 PM
Civil Sunrise:06:44 AM
Civil Sunset: 4:57 PM
Nautical Sunrise: 06:09 AM
Nautical Sunset: 5:32 PM
Astro Sunrise: 05:36 AM
Astro Sunset: 6:06 PM
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