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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 8:01 pm CST Dec 7, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Tonight Monday Tuesday Wednesday Thursday Friday Saturday Sunday
20% chance of rain & snow on Tonight 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 Mostly Sunny on Sunday
Low: 24°F High: 36°F High: 50°F High: 51°F High: 38°F High: 30°F High: 22°F High: 26°F
Low: 26°F Low: 42°F Low: 27°F Low: 20°F Low: 8 °F Low: 9 °F  
Rain & Snow Mostly Cloudy Mostly Sunny Partly Sunny Rain & Snow Partly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
34°
Feels like 25°F
Cloudy
Mist
as of 10:22 PM CST
Rel. Humidity: 93%
Dew Point: 32°F
Visibility: 3 Miles
Pressure: 30.22 in.
Flight Rule: IFR
Wind Data
12 MPH
Gust: 21 MPH
350° North
Cloud Level(s): Solid Overcast at 800ft
Current Conditions at
SPARTA - (KSAR)
30°
Feels like 20°F
Cloudy
as of 10:35 PM CST
Rel. Humidity: 92%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: MVFR
Wind Data
12 MPH
Gust: 17 MPH
0° North
Cloud Level(s): Solid Overcast at 1300ft
Current Conditions at
CAIRO - (KCIR)
37°
Feels like 29°F
Cloudy
as of 10:35 PM CST
Rel. Humidity: 93%
Dew Point: 36°F
Visibility: 3 Miles
Pressure: 30.20 in.
Flight Rule: IFR
Wind Data
13 MPH
0° North
Cloud Level(s): Solid Overcast at 700ft
20% chance of rain & snow Tonight Tonight... A slight chance of rain and snow before midnight, then a chance of flurries between midnight and 1am. Cloudy, with a low around 24. North wind 7 to 10 mph. Chance of precipitation is 20%.
Mostly Cloudy on Monday Monday... Mostly cloudy, then gradually becoming sunny, with a high near 36. North wind 5 to 7 mph becoming calm in the afternoon.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 26. Light and variable wind becoming south southwest 5 to 10 mph after midnight. Winds could gust as high as 18 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 50. South southwest wind 11 to 15 mph, with gusts as high as 22 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 42. Southwest wind 14 to 16 mph, with gusts as high as 24 mph.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 51. West southwest wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
20% chance of snow Wednesday Night Wednesday Night... A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 27. Northwest wind 5 to 7 mph becoming calm.
20% chance of rain & snow Thursday Thursday... A chance of rain and snow showers, mainly before noon. Mostly cloudy, with a high near 38. Northeast wind 5 to 8 mph becoming south southwest in the morning.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 20. North northwest wind 6 to 10 mph.
Partly Sunny on Friday Friday... Partly sunny, with a high near 30. Northwest wind 10 to 13 mph, with gusts as high as 18 mph.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 8. Northwest wind around 10 mph.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 22. Northwest wind 6 to 10 mph.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 9. North northwest wind 3 to 6 mph.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 26. Northwest wind 6 to 9 mph becoming south in the afternoon.
Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 07:01 AM
Sunset: 4:37 PM
Civil Sunrise:06:31 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 05:58 AM
Nautical Sunset: 5:40 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.