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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 6:17 am CST Jan 22, 2026 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Sunny on Today Cloudy on Tonight Mostly Cloudy on Friday 80% chance of snow on Saturday 40% chance of snow on Sunday Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday
High: 39°F Low: 14°F High: 14 °F High: 15°F High: 17°F High: 20°F High: 32°F High: 32°F
Low: 7 °F Low: 11°F Low: 3 °F Low: 8 °F Low: 18°F  
Mostly Sunny Cloudy Mostly Cloudy Snow Snow Sunny Mostly Sunny Partly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
21°
Clear
as of 7:52 AM CST
Rel. Humidity: 73%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 30.36 in.
Flight Rule: VFR
Wind Data
3 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
23°
Clear
as of 7:55 AM CST
Rel. Humidity: 73%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.36 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
21°
Mostly Cloudy
as of 7:45 AM CST
Rel. Humidity: 67%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.36 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 15000ft
Current Conditions at
CAIRO - (KCIR)
30°
Clear
as of 7:55 AM CST
Rel. Humidity: 58%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.37 in.
Flight Rule: VFR
Wind Data
6 MPH
020° North
Cloud Level(s): Clear
Mostly Sunny on Today Today... Mostly sunny, with a high near 39. North northwest wind around 5 mph becoming calm in the morning.

Cloudy on Tonight Tonight... Partly cloudy, with a low around 14. Light north wind increasing to 9 to 14 mph after midnight. Winds could gust as high as 23 mph.

Mostly Cloudy on Friday Friday... Mostly cloudy, with a temperature falling to around 14 by 8am. Wind chill values as low as -1. North wind around 14 mph, with gusts as high as 23 mph.

20% chance of snow Friday Night Friday Night... A 20 percent chance of snow showers after midnight. Cloudy, with a low around 7. Wind chill values as low as -7. North northeast wind 10 to 13 mph, with gusts as high as 21 mph.

80% chance of snow Saturday Saturday... Snow showers. High near 15. Northeast wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

90% chance of snow Saturday Night Saturday Night... Snow showers. Low around 11. Northeast wind 7 to 9 mph. Chance of precipitation is 90%.

40% chance of snow Sunday Sunday... A 40 percent chance of snow showers, mainly before noon. Mostly cloudy, with a high near 17. North northwest wind 8 to 10 mph.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 3. Northwest wind around 7 mph.

Sunny on Monday Monday... Sunny, with a high near 20. West northwest wind around 7 mph becoming south southwest in the afternoon.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 8. South southwest wind around 6 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 32. South southwest wind 5 to 7 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 18. South wind around 5 mph becoming west after midnight.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 32. West wind 5 to 8 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 07:09 AM
Sunset: 5:09 PM
Civil Sunrise:06:40 AM
Civil Sunset: 5:37 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 6:09 PM
Astro Sunrise: 05:37 AM
Astro Sunset: 6:41 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.