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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: 8:31 pm CST Jan 27, 2026 Latitude: 37.4519953 Longitude: -89.0736863 View on Google Maps

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Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Patchy Fog on Tonight Morning Fog on Wednesday Mostly Cloudy on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday Partly Sunny on Sunday Partly Sunny on Monday Partly Sunny on Tuesday
Low: 3 °F High: 29°F High: 29°F High: 17°F High: 16°F High: 24°F High: 33°F High: 33°F
Low: 12°F Low: 9 °F Low: 2 °F Low: 3 °F Low: 13°F Low: 17°F  
Patchy Fog Morning Fog Mostly Cloudy Mostly Sunny Mostly Sunny Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
MARION - (KMWA)
25°
Clear
as of 8:35 PM CST
Rel. Humidity: 45%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
25°
Clear
as of 7:52 PM CST
Rel. Humidity: 53%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.40 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
19°
Clear
as of 8:35 PM CST
Rel. Humidity: 85%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Patchy Fog on Tonight Tonight... Patchy fog. Otherwise, mostly cloudy, with a low around 3. Calm wind.

Morning Fog on Wednesday Wednesday... Areas of fog before 9am. Otherwise, sunny, with a high near 29. Calm wind becoming west around 5 mph.

Increasing Clouds on Wednesday Night Wednesday Night... Increasing clouds, with a low around 12. Calm wind.

Mostly Cloudy on Thursday Thursday... Mostly cloudy, with a high near 29. Calm wind becoming northeast around 5 mph.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 9. North northeast wind 3 to 6 mph.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 17. North wind 6 to 10 mph, with gusts as high as 18 mph.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 2. North wind 6 to 8 mph.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 16. North northwest wind 5 to 9 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 3. Light north northwest wind.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 24. Calm wind becoming west southwest around 6 mph in the morning.

10% chance of snow Sunday Night Sunday Night... A slight chance of snow showers. Mostly cloudy, with a low around 13. Light south southwest wind.

Partly Sunny on Monday Monday... Partly sunny, with a high near 33. Calm wind becoming west southwest around 6 mph.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 17. Calm wind.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 33. Calm wind becoming south southwest around 6 mph.

Current Radar Image


Sun Almanac for Mount Pleasant, Illinois
Sunrise: 07:03 AM
Sunset: 5:15 PM
Civil Sunrise:06:35 AM
Civil Sunset: 5:43 PM
Nautical Sunrise: 06:04 AM
Nautical Sunset: 6:14 PM
Astro Sunrise: 05:33 AM
Astro Sunset: 6:45 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.