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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 4:26 pm CST Nov 29, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday
90% chance of rain on This Afternoon 40% chance of rain on Tonight Partly Sunny on Sunday 30% chance of snow on Monday Partly Sunny on Tuesday Mostly Sunny on Wednesday Partly Sunny on Thursday 20% chance of on Friday
High: 41°F Low: 25°F High: 32°F High: 35°F High: 32°F High: 42°F High: 32°F High: 41°F
Low: 22°F Low: 24°F Low: 18°F Low: 21°F Low: 21°F  
Rain Rain Partly Sunny Snow Partly Sunny Mostly Sunny Partly Sunny Partly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
39°
Feels like 30°F
Cloudy
Light Rain Mist
as of 4:02 PM CST
Rel. Humidity: 86%
Dew Point: 36°F
Visibility: 6 Miles
Pressure: 29.99 in.
Flight Rule: MVFR
Wind Data
16 MPH
Gust: 28 MPH
180° South
Cloud Level(s): Solid Overcast at 2800ft
Current Conditions at
SPARTA - (KSAR)
39°
Feels like 29°F
Cloudy
as of 4:15 PM CST
Rel. Humidity: 100%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Wind Data
18 MPH
Gust: 26 MPH
180° South
Cloud Level(s): Solid Overcast at 1100ft
Current Conditions at
MARION - (KMWA)
39°
Feels like 30°F
Cloudy
Rain
as of 3:47 PM CST
Rel. Humidity: 86%
Dew Point: 36°F
Visibility: 5 Miles
Pressure: 29.99 in.
Flight Rule: MVFR
Wind Data
17 MPH
Gust: 23 MPH
180° South
Cloud Level(s): Solid Overcast at 5000ft
Current Conditions at
CAIRO - (KCIR)
41°
Feels like 33°F
Cloudy
as of 4:15 PM CST
Rel. Humidity: 86%
Dew Point: 37°F
Visibility: 7 Miles
Pressure: 30.04 in.
Flight Rule: MVFR
Wind Data
13 MPH
Gust: 18 MPH
170° South
Cloud Level(s): Solid Overcast at 2800ft
90% chance of rain This Afternoon This Afternoon... Showers, mainly before 5pm. High near 41. South wind 10 to 13 mph, with gusts as high as 31 mph. Chance of precipitation is 90%.
40% chance of rain Tonight Tonight... A 40 percent chance of showers before 11pm. Mostly cloudy, with a low around 25. South southwest wind 15 to 18 mph becoming west northwest after midnight. Winds could gust as high as 28 mph.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 32. West northwest wind 10 to 15 mph, with gusts as high as 24 mph.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 22. North northwest wind 5 to 7 mph becoming calm after midnight.
30% chance of snow Monday Monday... A 30 percent chance of snow showers after noon. Mostly cloudy, with a high near 35. Calm wind becoming east around 5 mph.
70% chance of snow Monday Night Monday Night... Snow showers likely. Cloudy, with a low around 24. Calm wind becoming north northwest around 5 mph after midnight. Chance of precipitation is 70%.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 32. North northwest wind 3 to 7 mph.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 18. Light and variable wind.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 42. Light south wind becoming south southwest 5 to 9 mph in the morning.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 21. South southwest wind 5 to 7 mph becoming north northwest after midnight.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 32. North northwest wind 3 to 7 mph.
10% chance of rain & snow Thursday Night Thursday Night... A slight chance of rain and snow showers. Mostly cloudy, with a low around 21. Light and variable wind.
20% chance of Friday Friday... A chance of showers. Partly sunny, with a high near 41. West wind 3 to 8 mph.
Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:53 AM
Sunset: 4:38 PM
Civil Sunrise:06:24 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 05:52 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 05:20 AM
Astro Sunset: 6:12 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.