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Denny, Illinois Weather Forecast
Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 10:21 am CST Nov 17, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Sunny on Today 70% chance of thunderstorms on Tonight 70% chance of thunderstorms on Tuesday Mostly Cloudy on Wednesday 90% chance of thunderstorms on Thursday Rain on Friday Partly Sunny on Saturday 10% chance of rain on Sunday
High: 61°F Low: 55°F High: 71°F High: 62°F High: 67°F High: 67°F High: 57°F High: 59°F
Low: 48°F Low: 49°F Low: 56°F Low: 45°F Low: 40°F  
Sunny Thunderstorms Thunderstorms Mostly Cloudy Thunderstorms Rain Partly Sunny Rain
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Current Conditions at
CARBONDALE - (KMDH)
55°
Clear
as of 10:52 AM CST
Rel. Humidity: 26%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
10 MPH
100° East
Cloud Level(s): Clear
Current Conditions at
SPARTA - (KSAR)
54°
Clear
as of 11:15 AM CST
Rel. Humidity: 30%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
8 MPH
140° Southeast
Cloud Level(s): Clear
Current Conditions at
MARION - (KMWA)
54°
Clear
as of 10:45 AM CST
Rel. Humidity: 30%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
12 MPH
110° East
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
61°
Clear
as of 11:15 AM CST
Rel. Humidity: 23%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
9 MPH
120° Southeast
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 61. Southeast wind 7 to 11 mph.
70% chance of thunderstorms Tonight Tonight... A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and 3am, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a steady temperature around 55. Southeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
70% chance of thunderstorms Tuesday Tuesday... Showers and thunderstorms likely before noon, then a chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 71. South wind 6 to 13 mph becoming west in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 70%.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 48. North wind 3 to 6 mph.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 62. North northwest wind around 5 mph becoming calm in the afternoon.
40% chance of rain Wednesday Night Wednesday Night... A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 49. Light and variable wind.
90% chance of thunderstorms Thursday Thursday... Showers and possibly a thunderstorm. High near 67. East southeast wind 5 to 9 mph becoming south southwest in the afternoon. Chance of precipitation is 90%.
Thunderstorms on Thursday Night Thursday Night... Showers and possibly a thunderstorm. Cloudy, with a low around 56. South southwest wind 6 to 8 mph.
Rain on Friday Friday... Showers likely. Mostly cloudy, with a high near 67. South wind 8 to 11 mph becoming west in the afternoon.
20% chance of thunderstorms Friday Night Friday Night... A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 45. Northwest wind 6 to 9 mph.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 57. Northwest wind 6 to 8 mph.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 40. Northwest wind around 5 mph becoming calm in the evening.
10% chance of rain Sunday Sunday... A slight chance of showers. Mostly sunny, with a high near 59. Calm wind becoming west 5 to 7 mph in the morning.
Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:41 AM
Sunset: 4:44 PM
Civil Sunrise:06:13 AM
Civil Sunset: 5:12 PM
Nautical Sunrise: 05:41 AM
Nautical Sunset: 5:44 PM
Astro Sunrise: 05:09 AM
Astro Sunset: 6:15 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.