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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 9:56 pm CST Nov 23, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Overnight Monday Tuesday Wednesday Thanksgiving Day Friday Saturday Sunday
Fog on Overnight 70% chance of rain on Monday 30% chance of rain on Tuesday Sunny on Wednesday Sunny on Thanksgiving Day Mostly Sunny on Friday 20% chance of rain & snow on Saturday Rain on Sunday
Low: 43°F High: 58°F High: 63°F High: 47°F High: 45°F High: 45°F High: 46°F High: 53°F
Low: 50°F Low: 37°F Low: 28°F Low: 26°F Low: 31°F Low: 37°F  
Fog Rain Rain Sunny Sunny Mostly Sunny Rain & Snow Rain
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Current Conditions at
CARBONDALE - (KMDH)
46°
Clear
Fog
as of 11:52 PM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 1/4 Miles
Pressure: 30.16 in.
Flight Rule: IFR
Wind Data
Calm
Current Conditions at
SPARTA - (KSAR)
45°
Cloudy
Fog
as of 11:55 PM CST
Rel. Humidity: 100%
Dew Point: 45°F
Visibility: 1/4 Miles
Pressure: 30.16 in.
Flight Rule: LIFR
Wind Data
5 MPH
140° Southeast
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
CAIRO - (KCIR)
46°
Cloudy
as of 11:55 PM CST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 1/4 Miles
Pressure: 30.16 in.
Flight Rule: LIFR
Wind Data
6 MPH
040° Northeast
Cloud Level(s): Solid Overcast at 300ft
Fog on Overnight Overnight... Widespread dense fog. Otherwise, mostly cloudy, with a low around 43. Calm wind.

70% chance of rain Monday Monday... Showers likely, mainly after 2pm. Widespread dense fog, mainly before 9am. Otherwise, cloudy, with a high near 58. South southeast wind 3 to 8 mph. Chance of precipitation is 70%.

100% chance of rain Monday Night Monday Night... Showers. Low around 50. South wind 3 to 6 mph. Chance of precipitation is 100%.

30% chance of rain Tuesday Tuesday... A 30 percent chance of showers, mainly after noon. Mostly cloudy, with a high near 63. West wind 3 to 7 mph.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 37. West wind 5 to 14 mph, with gusts as high as 21 mph.

Sunny on Wednesday Wednesday... Sunny, with a high near 47. West northwest wind 11 to 17 mph, with gusts as high as 25 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 28. West northwest wind 6 to 9 mph.

Sunny on Thanksgiving Day Thanksgiving Day... Sunny, with a high near 45. West northwest wind 5 to 10 mph becoming light in the afternoon.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 26. Calm wind.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 45. Calm wind becoming south southeast around 6 mph in the morning.

20% chance of rain & snow Friday Night Friday Night... A chance of rain and snow showers. Mostly cloudy, with a low around 31. Southeast wind 3 to 6 mph.

20% chance of rain & snow Saturday Saturday... A chance of rain and snow showers. Mostly cloudy, with a high near 46. South southeast wind 6 to 10 mph.

Rain on Saturday Night Saturday Night... Showers likely. Cloudy, with a low around 37. South southeast wind 7 to 9 mph.

Rain on Sunday Sunday... Showers likely. Mostly cloudy, with a high near 53. South wind 9 to 11 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:48 AM
Sunset: 4:40 PM
Civil Sunrise:06:20 AM
Civil Sunset: 5:09 PM
Nautical Sunrise: 05:47 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 05:16 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.