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Unionville, Illinois Weather Forecast
Unionville, Illinois Weather
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Weather Forecast for Unionville, Illinois : Massac County
Issued: 3:16 am CST Jan 18, 2026 Latitude: 37.1222782 Longitude: -88.5467121 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday M.L.King Day Tuesday Wednesday Thursday Friday Saturday
Mostly Clear on Overnight 20% chance of snow on Sunday Mostly Sunny on M.L.King Day Sunny on Tuesday 10% chance of rain & snow on Wednesday Sunny on Thursday 20% chance of rain on Friday 20% chance of rain on Saturday
Low: 14°F High: 31°F High: 25°F High: 36°F High: 45°F High: 40°F High: 48°F High: 40°F
Low: 18°F Low: 10°F Low: 25°F Low: 25°F Low: 25°F Low: 32°F  
Mostly Clear Snow Mostly Sunny Sunny Rain & Snow Sunny Rain Rain
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Current Conditions at
PADUCAH - (KPAH)
16°
Clear
as of 2:53 AM CST
Rel. Humidity: 61%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.27 in.
Flight Rule: VFR
Wind Data
5 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
18°
Clear
as of 3:35 AM CST
Rel. Humidity: 57%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
7 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
12°
Clear
as of 3:35 AM CST
Rel. Humidity: 66%
Dew Point: 3°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 14. Light west northwest wind.

20% chance of snow Sunday Sunday... A chance of flurries between 2pm and 3pm. Increasing clouds, with a high near 31. Light and variable wind becoming south southwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 18. Southwest wind 9 to 13 mph becoming northwest after midnight. Winds could gust as high as 23 mph.

Mostly Sunny on M.L.King Day M.L.King Day... Mostly sunny, with a high near 25. Northwest wind 5 to 9 mph becoming light north northwest in the afternoon.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 10. Calm wind.

Sunny on Tuesday Tuesday... Sunny, with a high near 36. Calm wind becoming south southwest around 6 mph in the morning.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 25. South wind 3 to 7 mph.

10% chance of rain & snow Wednesday Wednesday... A slight chance of rain and snow showers before noon, then a slight chance of rain showers. Partly sunny, with a high near 45. Southwest wind 5 to 10 mph becoming light in the afternoon. Winds could gust as high as 18 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 25. Calm wind.

Sunny on Thursday Thursday... Sunny, with a high near 40. Light northwest wind.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 25. Light and variable wind.

20% chance of rain Friday Friday... A chance of showers. Mostly cloudy, with a high near 48. South southwest wind 3 to 7 mph.

20% chance of rain Friday Night Friday Night... A chance of showers. Mostly cloudy, with a low around 32. South wind around 6 mph becoming north after midnight.

20% chance of rain Saturday Saturday... A chance of showers. Mostly cloudy, with a high near 40. North wind 6 to 8 mph.

Current Radar Image


Sun Almanac for Unionville, Illinois
Sunrise: 07:06 AM
Sunset: 5:04 PM
Civil Sunrise:06:37 AM
Civil Sunset: 5:32 PM
Nautical Sunrise: 06:06 AM
Nautical Sunset: 6:04 PM
Astro Sunrise: 05:34 AM
Astro Sunset: 6:35 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.