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Mount Pleasant, Illinois Weather Forecast
Mount Pleasant, Illinois Weather
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Weather Forecast for Mount Pleasant, Illinois : Union County
Issued: 3:16 pm CST Jan 20, 2026 Latitude: 37.4519953 Longitude: -89.0736863 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Wednesday Thursday Friday Saturday Sunday Monday
Sunny on This Afternoon 30% chance of snow on Tonight 20% chance of snow on Wednesday Mostly Sunny on Thursday Mostly Cloudy on Friday Snow on Saturday Partly Sunny on Sunday Mostly Sunny on Monday
High: 35°F Low: 26 °F High: 46°F High: 41°F High: 23°F High: 14°F High: 22°F High: 24°F
Low: 25°F Low: 18°F Low: 7 °F Low: 10°F Low: 7 °F  
Sunny Snow Snow Mostly Sunny Mostly Cloudy Snow Partly Sunny Mostly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
36°
Feels like 27°F
Clear
as of 3:52 PM CST
Rel. Humidity: 27%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.34 in.
Flight Rule: VFR
Wind Data
13 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
37°
Clear
as of 4:35 PM CST
Rel. Humidity: 32%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: VFR
Wind Data
8 MPH
160° South
Cloud Level(s): Clear
Sunny on This Afternoon This Afternoon... Sunny, with a high near 35. South wind around 7 mph.
30% chance of snow Tonight Tonight... A 30 percent chance of snow, mainly after 4am. Increasing clouds, with a temperature falling to near 26 by 8pm, then rising to around 33 during the remainder of the night. South wind 6 to 10 mph, with gusts as high as 20 mph.
20% chance of snow Wednesday Wednesday... A chance of drizzle before 9am, then a slight chance of snow between 9am and 10am. Cloudy, then gradually becoming mostly sunny, with a high near 46. West southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 25. Light and variable wind.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 41. North wind 3 to 5 mph.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 18. Calm wind becoming north 5 to 9 mph after midnight. Winds could gust as high as 18 mph.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 23. North wind 10 to 14 mph, with gusts as high as 23 mph.
20% chance of snow Friday Night Friday Night... A chance of snow, mainly after midnight. Cloudy, with a low around 7. North northeast wind 10 to 13 mph, with gusts as high as 22 mph.
Snow on Saturday Saturday... Snow likely, mainly after noon. Cloudy, with a high near 14. North northeast wind around 10 mph, with gusts as high as 20 mph.
Snow on Saturday Night Saturday Night... Snow likely, mainly before midnight. Mostly cloudy, with a low around 10. North wind 6 to 9 mph.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 22. North wind 3 to 7 mph.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 7. Calm wind.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 24. Calm wind becoming northwest around 6 mph.
Current Radar Image


Sun Almanac for Mount Pleasant, Illinois
Sunrise: 07:07 AM
Sunset: 5:07 PM
Civil Sunrise:06:39 AM
Civil Sunset: 5:35 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 6:07 PM
Astro Sunrise: 05:36 AM
Astro Sunset: 6:39 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.