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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 Dec 26, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Tonight Saturday Sunday Monday Tuesday Wednesday New Year's Day Friday
Morning Fog on Tonight Morning Fog on Saturday 70% chance of thunderstorms on Sunday Mostly Sunny on Monday Sunny on Tuesday Mostly Sunny on Wednesday Mostly Sunny on New Year's Day Mostly Sunny on Friday
Low: 47°F High: 68°F High: 71°F High: 27°F High: 36°F High: 43°F High: 32°F High: 31°F
Low: 60°F Low: 23°F Low: 19°F Low: 26°F Low: 22°F Low: 17°F  
Morning Fog Morning Fog Thunderstorms Mostly Sunny Sunny Mostly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
CARBONDALE - (KMDH)
63°
Mostly Clear
as of 5:52 PM CST
Rel. Humidity: 82%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
8 MPH
010° North
Cloud Level(s): Few at 10000ft
Current Conditions at
SPARTA - (KSAR)
57°
Clear
as of 6:35 PM CST
Rel. Humidity: 82%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
7 MPH
010° North
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
64°
Partly Cloudy
as of 5:45 PM CST
Rel. Humidity: 82%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 29.86 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 15000ft
Current Conditions at
CAIRO - (KCIR)
59°
Clear
as of 6:35 PM CST
Rel. Humidity: 100%
Dew Point: 59°F
Visibility: 7 Miles
Pressure: 29.88 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Morning Fog on Tonight Tonight... Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 47. North wind around 5 mph becoming calm after midnight.
Morning Fog on Saturday Saturday... Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 68. Light east wind becoming southeast 5 to 9 mph in the morning.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 60. South southwest wind 8 to 10 mph, with gusts as high as 18 mph.
70% chance of thunderstorms Sunday Sunday... Showers likely, with thunderstorms also possible after 3pm. Cloudy, with a high near 71. South southwest wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
80% chance of rain & snow Sunday Night Sunday Night... Rain showers before midnight, then a chance of rain and snow showers between midnight and 3am, then a chance of snow showers after 3am. Some thunder is also possible. Low around 23. Blustery, with a southwest wind 18 to 21 mph becoming west northwest in the evening. Winds could gust as high as 31 mph. Chance of precipitation is 80%.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 27. Blustery, with a west northwest wind 15 to 21 mph, with gusts as high as 31 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 19. Northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Sunny on Tuesday Tuesday... Sunny, with a high near 36. Northwest wind 6 to 10 mph becoming west southwest in the afternoon.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 26. West southwest wind around 6 mph.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 43. West wind 6 to 9 mph.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 22. Northwest wind around 6 mph.
Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 32. North northwest wind 5 to 8 mph.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 17. Light north northwest wind.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 31. Light and variable wind becoming north 5 to 7 mph in the morning.
Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 07:12 AM
Sunset: 4:44 PM
Civil Sunrise:06:43 AM
Civil Sunset: 5:14 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:47 PM
Astro Sunrise: 05:37 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.