Union, Illinois Weather
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Weather Forecast for Union, Illinois : Mason County
Issued: 2:56 am CDT Jun 4, 2025 Latitude: 40.3908741 Longitude: -89.809555 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
100% chance of thunderstorms on Overnight 80% chance of thunderstorms on Wednesday Mostly Sunny on Thursday 50% chance of rain on Friday Mostly Sunny on Saturday 40% chance of rain on Sunday Sunny on Monday Mostly Sunny on Tuesday
Low: 63°F High: 71°F High: 79°F High: 78°F High: 79°F High: 81°F High: 78°F High: 80°F
Low: 58°F Low: 60°F Low: 60°F Low: 58°F Low: 59°F Low: 56°F  
Thunderstorms Thunderstorms Mostly Sunny Rain Mostly Sunny Rain Sunny Mostly Sunny
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Current Conditions at
PEORIA - (KPIA)
68°
Cloudy
Light Rain Mist
as of 4:54 AM CDST
Rel. Humidity: 93%
Dew Point: 66°F
Visibility: 6 Miles
Pressure: 29.89 in.
Flight Rule: LIFR
Wind Data
6 MPH
230° Southwest
Cloud Level(s): Broken at 300ft, Solid Overcast at 600ft
Current Conditions at
LOGAN COUNTY AIRPORT - (KAAA)
70°
Cloudy
Light Rain
as of 5:15 AM CDST
Rel. Humidity: 100%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.92 in.
Flight Rule: IFR
Wind Data
5 MPH
220° Southwest
Cloud Level(s): Broken at 900ft, Solid Overcast at 2100ft
Current Conditions at
SPRINGFIELD - (KSPI)
68°
Cloudy
Light Rain
as of 4:52 AM CDST
Rel. Humidity: 93%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.91 in.
Flight Rule: IFR
Wind Data
7 MPH
220° Southwest
Cloud Level(s): Broken at 900ft, Broken at 4200ft, Solid Overcast at 12000ft
Current Conditions at
BLOOMINGTON - (KBMI)
68°
Cloudy
Light Rain
as of 4:56 AM CDST
Rel. Humidity: 100%
Dew Point: 68°F
Visibility: 10 Miles
Pressure: 29.91 in.
Flight Rule: MVFR
Wind Data
5 MPH
230° Southwest
Cloud Level(s): Solid Overcast at 2800ft
100% chance of thunderstorms Overnight Overnight... Showers and possibly a thunderstorm. Low around 63. South southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
80% chance of thunderstorms Wednesday Wednesday... Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 71. West southwest wind around 7 mph becoming north northeast in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
40% chance of thunderstorms Wednesday Night Wednesday Night... A 40 percent chance of showers and thunderstorms, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 58. Northeast wind around 6 mph becoming calm in the evening.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 79. East northeast wind around 6 mph.
30% chance of rain Thursday Night Thursday Night... A 30 percent chance of showers after 1am. Partly cloudy, with a low around 60. East northeast wind 3 to 5 mph.
50% chance of rain Friday Friday... A 50 percent chance of showers. Mostly cloudy, with a high near 78. North northeast wind 3 to 5 mph.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 60. North northeast wind around 5 mph becoming calm in the evening.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 79.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 58.
40% chance of rain Sunday Sunday... A 40 percent chance of showers after 1pm. Mostly sunny, with a high near 81.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 59.
Sunny on Monday Monday... Sunny, with a high near 78.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 56.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 80.
Current Radar Image


Sun Almanac for Union, Illinois
Sunrise: 05:30 AM
Sunset: 8:25 PM
Civil Sunrise:04:57 AM
Civil Sunset: 8:58 PM
Nautical Sunrise: 04:16 AM
Nautical Sunset: 9:39 PM
Astro Sunrise: 03:28 AM
Astro Sunset: 10:27 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.