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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 3:16 pm CST Jan 10, 2026 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday
Sunny on This Afternoon 30% chance of snow on Tonight Sunny on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday
High: 46°F Low: 27°F High: 39°F High: 51°F High: 58°F High: 45°F High: 37°F High: 44°F
Low: 26°F Low: 36°F Low: 40°F Low: 20°F Low: 28°F  
Sunny Snow Sunny Sunny Mostly Sunny Mostly Cloudy Mostly Sunny Partly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
45°
Feels like 38°F
Clear
as of 3:52 PM CST
Rel. Humidity: 42%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
13 MPH
Gust: 24 MPH
300° Northwest
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
45°
Clear
as of 4:15 PM CST
Rel. Humidity: 42%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.17 in.
Flight Rule: VFR
Wind Data
8 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
45°
Feels like 38°F
Partly Cloudy
as of 3:47 PM CST
Rel. Humidity: 52%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
12 MPH
320° Northwest
Cloud Level(s): Scattered at 3800ft
Current Conditions at
CAIRO - (KCIR)
48°
Feels like 44°F
Mostly Cloudy
as of 4:15 PM CST
Rel. Humidity: 53%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
9 MPH
310° Northwest
Cloud Level(s): Broken at 4600ft
Sunny on This Afternoon This Afternoon... Sunny, with a high near 46. West southwest wind 6 to 11 mph, with gusts as high as 21 mph.

30% chance of snow Tonight Tonight... A chance of rain showers before midnight, then a slight chance of sprinkles between midnight and 1am, then a slight chance of flurries after 1am. Partly cloudy, with a low around 27. Southwest wind 5 to 10 mph becoming northwest 13 to 18 mph in the evening. Winds could gust as high as 28 mph. Chance of precipitation is 30%.

Sunny on Sunday Sunday... Sunny, with a high near 39. Northwest wind 6 to 15 mph, with gusts as high as 28 mph.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 26. Calm wind becoming south southwest around 6 mph after midnight.

Sunny on Monday Monday... Sunny, with a high near 51. Southwest wind 7 to 10 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 36. South southwest wind 6 to 9 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 58. South southwest wind 10 to 14 mph, with gusts as high as 21 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 40. West wind 6 to 9 mph.

Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 45. North northwest wind 7 to 14 mph, with gusts as high as 21 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 20. North northwest wind 6 to 10 mph.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 37. North northwest wind 6 to 8 mph becoming southwest in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 28. South southwest wind 6 to 8 mph.

Partly Sunny on Friday Friday... Partly sunny, with a high near 44. West southwest wind 9 to 14 mph, with gusts as high as 22 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 07:13 AM
Sunset: 4:56 PM
Civil Sunrise:06:44 AM
Civil Sunset: 5:26 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 5:58 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:30 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.