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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 3:16 pm CST Dec 2, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Patchy Fog on Tonight Mostly Sunny on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday 10% chance of rain on Sunday Partly Sunny on Monday Partly Sunny on Tuesday
Low: 21°F High: 43°F High: 29°F High: 39°F High: 42°F High: 39°F High: 36°F High: 43°F
Low: 20°F Low: 17°F Low: 24°F Low: 26°F Low: 22°F Low: 27°F  
Patchy Fog Mostly Sunny Mostly Sunny Mostly Sunny Mostly Sunny Rain Partly Sunny Partly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
27°
Cloudy
as of 5:52 PM CST
Rel. Humidity: 79%
Dew Point: 21°F
Visibility: 9 Miles
Pressure: 30.13 in.
Flight Rule: MVFR
Wind Data
5 MPH
230° Southwest
Cloud Level(s): Solid Overcast at 1600ft
Current Conditions at
SPARTA - (KSAR)
27°
Cloudy
as of 5:55 PM CST
Rel. Humidity: 79%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: MVFR
Wind Data
3 MPH
200° South
Cloud Level(s): Solid Overcast at 1400ft
Current Conditions at
MARION - (KMWA)
25°
Cloudy
as of 5:45 PM CST
Rel. Humidity: 79%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1500ft
Current Conditions at
CAIRO - (KCIR)
30°
Cloudy
as of 5:55 PM CST
Rel. Humidity: 74%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 1800ft
Patchy Fog on Tonight Tonight... Patchy fog between 8pm and 9pm. Otherwise, partly cloudy, with a low around 21. Calm wind becoming south around 5 mph after midnight.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 43. South southwest wind 5 to 10 mph becoming light in the afternoon.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 20. Light and variable wind becoming north 5 to 10 mph in the evening.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 29. North wind 5 to 10 mph becoming light north northeast in the afternoon.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 17. Calm wind.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph in the morning.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 24. Light and variable wind.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 42. Calm wind becoming west around 6 mph.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 26. Calm wind becoming east around 5 mph after midnight.

10% chance of rain Sunday Sunday... A slight chance of showers after noon. Mostly cloudy, with a high near 39. East wind 5 to 8 mph becoming north in the afternoon.

10% chance of rain Sunday Night Sunday Night... A slight chance of showers. Mostly cloudy, with a low around 22. North northwest wind around 6 mph.

Partly Sunny on Monday Monday... Partly sunny, with a high near 36. North northwest wind 5 to 7 mph becoming south southwest in the afternoon.

10% chance of freezing rain Monday Night Monday Night... A slight chance of freezing rain. Mostly cloudy, with a low around 27. Southwest wind 3 to 6 mph.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 43. West southwest wind 6 to 10 mph.

Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:56 AM
Sunset: 4:38 PM
Civil Sunrise:06:27 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 05:54 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:23 AM
Astro Sunset: 6:11 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.