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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 10:31 am CST Nov 21, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Saturday Sunday Monday Tuesday Wednesday Thanksgiving Day
40% chance of thunderstorms on This Afternoon 30% chance of rain on Tonight Mostly Cloudy on Saturday Sunny on Sunday 60% chance of rain on Monday 10% chance of on Tuesday Mostly Sunny on Wednesday Mostly Sunny on Thanksgiving Day
High: 61°F Low: 46°F High: 58°F High: 63°F High: 60°F High: 65°F High: 51°F High: 46°F
Low: 37°F Low: 42°F Low: 52°F Low: 38°F Low: 27°F  
Thunderstorms Rain Mostly Cloudy Sunny Rain Partly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
61°
Cloudy
Mist
as of 11:52 AM CST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 2 1/2 Miles
Pressure: 29.90 in.
Flight Rule: LIFR
Wind Data
9 MPH
180° South
Cloud Level(s): Solid Overcast at 400ft
Current Conditions at
SPARTA - (KSAR)
57°
Cloudy
as of 11:55 AM CST
Rel. Humidity: 100%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: LIFR
Wind Data
3 MPH
170° South
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
MARION - (KMWA)
61°
Cloudy
Mist
as of 11:45 AM CST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 3 Miles
Pressure: 29.91 in.
Flight Rule: IFR
Wind Data
6 MPH
170° South
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
CAIRO - (KCIR)
64°
Cloudy
as of 11:55 AM CST
Rel. Humidity: 93%
Dew Point: 63°F
Visibility: 5 Miles
Pressure: 29.92 in.
Flight Rule: IFR
Wind Data
5 MPH
200° South
Cloud Level(s): Solid Overcast at 500ft
40% chance of thunderstorms This Afternoon This Afternoon... A chance of showers, with thunderstorms also possible after 5pm. Cloudy, with a high near 61. South wind 5 to 7 mph becoming light and variable. Chance of precipitation is 40%.
30% chance of rain Tonight Tonight... A 30 percent chance of showers, mainly before 10pm. Mostly cloudy, with a low around 46. Calm wind becoming north around 6 mph after midnight.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, then gradually becoming sunny, with a high near 58. North wind 3 to 6 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 37. Calm wind.
Sunny on Sunday Sunday... Sunny, with a high near 63. Light and variable wind.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 42. Light south southeast wind.
60% chance of rain Monday Monday... Showers likely, mainly after noon. Cloudy, with a high near 60. Light south southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 60%.
Thunderstorms on Monday Night Monday Night... Showers and possibly a thunderstorm before midnight, then showers likely. Mostly cloudy, with a low around 52. South wind 7 to 9 mph.
10% chance of Tuesday Tuesday... A slight chance of showers. Partly sunny, with a high near 65. South southwest wind 7 to 10 mph becoming west northwest in the afternoon.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 38. Northwest wind around 7 mph.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 51. West northwest wind 7 to 13 mph, with gusts as high as 18 mph.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 27. West wind 5 to 7 mph.
Mostly Sunny on Thanksgiving Day Thanksgiving Day... Mostly sunny, with a high near 46. West wind 5 to 10 mph.
Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:45 AM
Sunset: 4:41 PM
Civil Sunrise:06:17 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 05:44 AM
Nautical Sunset: 5:42 PM
Astro Sunrise: 05:13 AM
Astro Sunset: 6:14 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.