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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 6:36 pm CST Jan 22, 2026 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

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Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
Cloudy on Tonight Partly Sunny on Friday 90% chance of snow & sleet on Saturday 80% chance of snow on Sunday Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday Partly Sunny on Thursday
Low: 14°F High: 12 °F High: 15°F High: 17°F High: 15°F High: 30°F High: 28°F High: 19°F
Low: 7 °F Low: 11°F Low: 3 °F Low: 3 °F Low: 14°F Low: 5 °F  
Cloudy Partly Sunny Snow & Sleet Snow Sunny Mostly Sunny Partly Sunny Partly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
28°
Clear
as of 7:52 PM CST
Rel. Humidity: 42%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.31 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
28°
Clear
as of 8:15 PM CST
Rel. Humidity: 50%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.32 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
23°
Clear
as of 8:15 PM CST
Rel. Humidity: 57%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
30°
Clear
as of 8:15 PM CST
Rel. Humidity: 74%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.31 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Cloudy on Tonight Tonight... Partly cloudy, with a low around 14. Light north northeast wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 25 mph.

Partly Sunny on Friday Friday... Partly sunny, with a temperature falling to around 12 by 5pm. Wind chill values as low as -3. North wind 13 to 16 mph, with gusts as high as 25 mph.

20% chance of snow Friday Night Friday Night... A 20 percent chance of snow after midnight. Increasing clouds, with a low around 7. Wind chill values as low as -7. Northeast wind 11 to 14 mph, with gusts as high as 20 mph.

90% chance of snow & sleet Saturday Saturday... Snow before 3pm, then snow, possibly mixed with sleet. High near 15. Wind chill values as low as -6. Northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

90% chance of snow & sleet Saturday Night Saturday Night... Snow, possibly mixed with sleet, becoming all snow after 9pm. The snow could be heavy at times. Low around 11. Northeast wind 9 to 11 mph. Chance of precipitation is 90%.

80% chance of snow Sunday Sunday... Snow, mainly before noon. High near 17. North wind 11 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

20% chance of snow Sunday Night Sunday Night... A slight chance of snow before 8pm, then a slight chance of snow showers between 8pm and midnight. Mostly cloudy, with a low around 3. Northwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

Sunny on Monday Monday... Sunny, with a high near 15. Northwest wind 6 to 9 mph becoming southwest in the afternoon.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 3. South southwest wind around 6 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 30. Southwest wind 5 to 7 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 14. West southwest wind 3 to 5 mph.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 28. West southwest wind 5 to 7 mph becoming north northwest in the afternoon.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 5. North northwest wind around 6 mph.

Partly Sunny on Thursday Thursday... Partly sunny, with a high near 19. North northwest wind 6 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.