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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 4:01 pm CST Nov 25, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Wednesday Thanksgiving Day Friday Saturday Sunday Monday
Mostly Cloudy on This Afternoon Mostly Clear on Tonight Mostly Sunny on Wednesday Sunny on Thanksgiving Day Sunny on Friday Rain and Snow on Saturday 20% chance of rain & snow on Sunday 20% chance of snow on Monday
High: 57°F Low: 35°F High: 46°F High: 43°F High: 39°F High: 41°F High: 37°F High: 34°F
Low: 29°F Low: 23°F Low: 28°F Low: 30°F Low: 21°F  
Mostly Cloudy Mostly Clear Mostly Sunny Sunny Sunny Rain and Snow Rain & Snow Snow
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Current Conditions at
CARBONDALE - (KMDH)
59°
Cloudy
as of 3:34 PM CST
Rel. Humidity: 87%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 29.87 in.
Flight Rule: VFR
Wind Data
5 MPH
250° West
Cloud Level(s): Broken at 3300ft, Solid Overcast at 5000ft
Current Conditions at
SPARTA - (KSAR)
57°
Cloudy
as of 3:35 PM CST
Rel. Humidity: 87%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 29.88 in.
Flight Rule: MVFR
Wind Data
10 MPH
290° West
Cloud Level(s): Scattered at 1600ft, Broken at 2700ft, Solid Overcast at 3500ft
Current Conditions at
CAIRO - (KCIR)
63°
Cloudy
as of 3:35 PM CST
Rel. Humidity: 82%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.89 in.
Flight Rule: MVFR
Wind Data
6 MPH
230° Southwest
Cloud Level(s): Broken at 1900ft, Broken at 2500ft, Solid Overcast at 3300ft
Mostly Cloudy on This Afternoon This Afternoon... Mostly cloudy, with a steady temperature around 57. West wind around 5 mph.

Mostly Clear on Tonight Tonight... Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 33 mph.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 46. Breezy, with a west northwest wind 11 to 20 mph, with gusts as high as 32 mph.

Increasing Clouds on Wednesday Night Wednesday Night... Increasing clouds, with a low around 29. West northwest wind 6 to 10 mph.

Sunny on Thanksgiving Day Thanksgiving Day... Sunny, with a high near 43. West northwest wind 6 to 13 mph.

Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 23. West northwest wind around 5 mph becoming calm in the evening.

Sunny on Friday Friday... Sunny, with a high near 39. Light and variable wind.

20% chance of snow Friday Night Friday Night... A chance of snow showers after midnight. Mostly cloudy, with a low around 28. Calm wind becoming southeast 5 to 7 mph after midnight.

Rain and Snow on Saturday Saturday... Rain and snow showers likely before noon, then rain showers. Cloudy, with a high near 41. South wind 8 to 11 mph, with gusts as high as 20 mph.

Rain on Saturday Night Saturday Night... Showers. Cloudy, with a low around 30. South wind 7 to 10 mph becoming west northwest after midnight.

20% chance of rain & snow Sunday Sunday... A chance of rain and snow showers. Mostly cloudy, with a high near 37. Northwest wind 9 to 11 mph.

20% chance of snow Sunday Night Sunday Night... A chance of snow showers. Mostly cloudy, with a low around 21. North wind 5 to 8 mph.

20% chance of snow Monday Monday... A chance of snow showers. Mostly cloudy, with a high near 34. North wind around 7 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:49 AM
Sunset: 4:40 PM
Civil Sunrise:06:20 AM
Civil Sunset: 5:08 PM
Nautical Sunrise: 05:48 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 05:17 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.