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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 4:21 pm CST Dec 27, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday New Year's Day Friday Saturday
Morning Fog on Tonight 70% chance of thunderstorms on Sunday Mostly Sunny on Monday Sunny on Tuesday Mostly Sunny on Wednesday Mostly Sunny on New Year's Day Partly Sunny on Friday Mostly Cloudy on Saturday
Low: 65 °F High: 70°F High: 29°F High: 33°F High: 44°F High: 41°F High: 40°F High: 47°F
Low: 21°F Low: 18°F Low: 25°F Low: 27°F Low: 21°F Low: 30°F  
Morning Fog Thunderstorms Mostly Sunny Sunny Mostly Sunny Mostly Sunny Partly Sunny Mostly Cloudy
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Current Conditions at
CARBONDALE - (KMDH)
63°
Cloudy
as of 6:24 PM CST
Rel. Humidity: 93%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: MVFR
Wind Data
15 MPH
180° South
Cloud Level(s): Solid Overcast at 1000ft
Current Conditions at
SPARTA - (KSAR)
61°
Cloudy
as of 6:15 PM CST
Rel. Humidity: 100%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.84 in.
Flight Rule: IFR
Wind Data
10 MPH
170° South
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
MARION - (KMWA)
63°
Cloudy
as of 5:45 PM CST
Rel. Humidity: 93%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.86 in.
Flight Rule: IFR
Wind Data
14 MPH
Gust: 21 MPH
180° South
Cloud Level(s): Solid Overcast at 800ft
Current Conditions at
CAIRO - (KCIR)
64°
Cloudy
as of 6:15 PM CST
Rel. Humidity: 100%
Dew Point: 64°F
Visibility: 1 1/2 Miles
Pressure: 29.89 in.
Flight Rule: LIFR
Wind Data
7 MPH
170° South
Cloud Level(s): Solid Overcast at 200ft
Morning Fog on Tonight Tonight... Patchy fog between 11pm and 4am. Otherwise, cloudy, with a temperature rising to around 65 by 5am. South southwest wind 8 to 11 mph, with gusts as high as 24 mph.

70% chance of thunderstorms Sunday Sunday... A chance of showers before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Patchy fog between 9am and 10am. Otherwise, mostly cloudy, with a high near 70. Breezy, with a south southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 70%.

60% chance of rain & snow Sunday Night Sunday Night... Rain showers likely before 11pm, then a slight chance of snow showers between 11pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 21. Blustery, with a west northwest wind 20 to 25 mph, with gusts as high as 39 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 29. Blustery, with a west northwest wind 17 to 21 mph, with gusts as high as 31 mph.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 18. Northwest wind 9 to 16 mph, with gusts as high as 23 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 33. Northwest wind 5 to 9 mph.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 25. West southwest wind 3 to 6 mph.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 44. West wind 6 to 9 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 27. West wind around 6 mph.

Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 41. Northwest wind 6 to 9 mph.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 21. North wind 3 to 5 mph.

Partly Sunny on Friday Friday... Partly sunny, with a high near 40. North northeast wind 5 to 8 mph becoming south southwest in the afternoon.

10% chance of rain Friday Night Friday Night... A slight chance of showers. Mostly cloudy, with a low around 30. South wind around 6 mph.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 47. South wind 6 to 8 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 07:12 AM
Sunset: 4:45 PM
Civil Sunrise:06:43 AM
Civil Sunset: 5:14 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:47 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:19 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.