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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Click for Hazardous Weather Outlook for Denny, Illinois
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Weather Forecast for Denny, Illinois : Perry County
Issued: 12:06 pm CST Nov 22, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thanksgiving Day Friday
Mostly Sunny on This Afternoon Patchy Fog on Tonight Sunny on Sunday 50% chance of rain on Monday 20% chance of rain on Tuesday Mostly Sunny on Wednesday Sunny on Thanksgiving Day Mostly Sunny on Friday
High: 55°F Low: 41°F High: 60°F High: 58°F High: 65°F High: 48°F High: 46°F High: 47°F
Low: 41°F Low: 49°F Low: 37°F Low: 28°F Low: 26°F  
Mostly Sunny Patchy Fog Sunny Rain Rain Mostly Sunny Sunny Mostly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
54°
Partly Cloudy
as of 1:57 PM CST
Rel. Humidity: 76%
Dew Point: 46°F
Visibility: 7 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 1400ft
Current Conditions at
SPARTA - (KSAR)
57°
Clear
as of 1:55 PM CST
Rel. Humidity: 54%
Dew Point: 41°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
3 MPH
0° North
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
52°
Mostly Cloudy
as of 1:47 PM CST
Rel. Humidity: 81%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
6 MPH
020° North
Cloud Level(s): Broken at 3700ft
Current Conditions at
CAIRO - (KCIR)
55°
Cloudy
as of 1:55 PM CST
Rel. Humidity: 87%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.09 in.
Flight Rule: MVFR
Wind Data
8 MPH
020° North
Cloud Level(s): Solid Overcast at 1000ft
Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 55. North wind around 6 mph becoming calm.
Patchy Fog on Tonight Tonight... Patchy fog between 8pm and 10pm. Otherwise, mostly clear, with a low around 41. Light west wind.
Sunny on Sunday Sunday... Sunny, with a high near 60. Light and variable wind.
Increasing Clouds on Sunday Night Sunday Night... Increasing clouds, with a low around 41. Light southeast wind.
50% chance of rain Monday Monday... A 50 percent chance of showers after noon. Cloudy, with a high near 58. South southeast wind 3 to 8 mph.
90% chance of rain Monday Night Monday Night... Showers. Low around 49. Southeast wind around 7 mph becoming south southwest after midnight. Chance of precipitation is 90%.
20% chance of rain Tuesday Tuesday... A 20 percent chance of showers after noon. Mostly cloudy, with a high near 65. Southwest wind 6 to 9 mph.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 37. West northwest wind 6 to 10 mph.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 48. West northwest wind 8 to 14 mph, with gusts as high as 21 mph.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 28. West northwest wind around 6 mph.
Sunny on Thanksgiving Day Thanksgiving Day... Sunny, with a high near 46. West northwest wind 5 to 8 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 26. Light west northwest wind.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 47. Light and variable wind becoming west 5 to 7 mph in the morning.
Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:46 AM
Sunset: 4:41 PM
Civil Sunrise:06:18 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 05:45 AM
Nautical Sunset: 5:42 PM
Astro Sunrise: 05:14 AM
Astro Sunset: 6:13 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.