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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 12, 2026 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Sunny on This Afternoon Mostly Clear on Tonight Sunny on Tuesday Mostly Cloudy on Wednesday Sunny on Thursday Partly Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday
High: 47°F Low: 35°F High: 61°F High: 44°F High: 31°F High: 44°F High: 30°F High: 26°F
Low: 39°F Low: 18°F Low: 24°F Low: 20°F Low: 12°F  
Sunny Mostly Clear Sunny Mostly Cloudy Sunny Partly Sunny Partly Sunny Mostly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
50°
Feels like 45°F
Clear
as of 3:52 PM CST
Rel. Humidity: 37%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.23 in.
Flight Rule: VFR
Wind Data
12 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
52°
Clear
as of 4:35 PM CST
Rel. Humidity: 34%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
8 MPH
170° South
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
50°
Feels like 45°F
Clear
as of 4:35 PM CST
Rel. Humidity: 46%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.28 in.
Flight Rule: VFR
Wind Data
13 MPH
Gust: 16 MPH
220° Southwest
Cloud Level(s): Clear
Sunny on This Afternoon This Afternoon... Sunny, with a steady temperature around 47. South southwest wind around 7 mph.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 35. South southwest wind 7 to 9 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 61. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.

40% chance of rain Tuesday Night Tuesday Night... A 40 percent chance of showers. Increasing clouds, with a low around 39. Southwest wind around 7 mph becoming northwest after midnight.

Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 44. North northwest wind 8 to 18 mph, with gusts as high as 26 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 18. North northwest wind 9 to 18 mph, with gusts as high as 25 mph.

Sunny on Thursday Thursday... Sunny, with a high near 31. Northwest wind 5 to 9 mph becoming southwest in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 24. Light south southwest wind increasing to 5 to 10 mph in the evening. Winds could gust as high as 20 mph.

Partly Sunny on Friday Friday... Partly sunny, with a high near 44. West wind 10 to 15 mph, with gusts as high as 23 mph.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 20. West wind around 10 mph.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 30. West wind 10 to 14 mph, with gusts as high as 21 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 12. West northwest wind around 10 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 26. West northwest wind 8 to 13 mph, with gusts as high as 18 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 07:13 AM
Sunset: 4:58 PM
Civil Sunrise:06:44 AM
Civil Sunset: 5:27 PM
Nautical Sunrise: 06:11 AM
Nautical Sunset: 6:00 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:32 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.