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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 5:11 pm CST Dec 6, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
10% chance of  on Tonight 10% chance of  on Sunday Mostly Cloudy on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of rain & snow on Thursday Partly Sunny on Friday Mostly Sunny on Saturday
Low: 34°F High: 44°F High: 36°F High: 49°F High: 50°F High: 39°F High: 30°F High: 27°F
Low: 23°F Low: 25°F Low: 41°F Low: 28°F Low: 20°F Low: 10°F  
Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Sunny Partly Sunny Rain & Snow Partly Sunny Mostly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
39°
Feels like 33°F
Clear
Haze
as of 6:52 PM CST
Rel. Humidity: 80%
Dew Point: 34°F
Visibility: 6 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
9 MPH
180° South
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
41°
Feels like 34°F
Clear
as of 7:35 PM CST
Rel. Humidity: 75%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
10 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
39°
Feels like 32°F
Clear
as of 6:45 PM CST
Rel. Humidity: 80%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: VFR
Wind Data
12 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
39°
Feels like 32°F
Cloudy
as of 7:35 PM CST
Rel. Humidity: 86%
Dew Point: 36°F
Visibility: 4 Miles
Pressure: 30.00 in.
Flight Rule: IFR
Wind Data
10 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 600ft
10% chance of  Tonight Tonight... A slight chance of drizzle after 4am. Mostly cloudy, with a low around 34. South wind 3 to 5 mph.

10% chance of  Sunday Sunday... A slight chance of drizzle before 5pm. Mostly cloudy, with a high near 44. Light and variable wind becoming north 8 to 13 mph in the morning. Winds could gust as high as 18 mph.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 23. North wind 6 to 13 mph, with gusts as high as 18 mph.

Mostly Cloudy on Monday Monday... Mostly cloudy, then gradually becoming sunny, with a high near 36. North wind around 6 mph becoming calm in the afternoon.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 25. Light and variable wind becoming south southwest 5 to 10 mph after midnight.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 49. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 41. South southwest wind 14 to 16 mph, with gusts as high as 24 mph.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 50. Southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

10% chance of rain & snow Wednesday Night Wednesday Night... A slight chance of rain showers before midnight, then a slight chance of rain and snow showers. Mostly cloudy, with a low around 28. Northwest wind 5 to 7 mph becoming east after midnight.

20% chance of rain & snow Thursday Thursday... A chance of rain and snow showers before noon. Mostly cloudy, with a high near 39. East wind 7 to 10 mph becoming west in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 20. West northwest wind 6 to 8 mph.

Partly Sunny on Friday Friday... Partly sunny, with a high near 30. Northwest wind 8 to 11 mph.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 10. Northwest wind 7 to 9 mph.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 27. Northwest wind 7 to 10 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 07:00 AM
Sunset: 4:37 PM
Civil Sunrise:06:30 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 05:58 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:26 AM
Astro Sunset: 6:11 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.