Denny, Illinois Weather
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Weather Forecast for Denny, Illinois : Perry County
Issued: 1:31 pm CDT Sep 18, 2025 Latitude: 38.0475507 Longitude: -89.3270302 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Friday Saturday Sunday Monday Tuesday Wednesday
Sunny on This Afternoon Increasing Clouds on Tonight 30% chance of thunderstorms on Friday 20% chance of thunderstorms on Saturday 40% chance of thunderstorms on Sunday 20% chance of thunderstorms on Monday 20% chance of thunderstorms on Tuesday 20% chance of on Wednesday
High: 96°F Low: 63°F High: 91°F High: 91°F High: 89°F High: 87°F High: 84°F High: 81°F
Low: 64°F Low: 66°F Low: 66°F Low: 65°F Low: 63°F  
Sunny Increasing Clouds Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Partly Sunny
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Current Conditions at
SPARTA - (KSAR)
93°
Clear
as of 1:35 PM CDST
Rel. Humidity: 28%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
7 MPH
090° East
Cloud Level(s): Clear
Current Conditions at
CAIRO - (KCIR)
93°
Clear
as of 1:35 PM CDST
Rel. Humidity: 34%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Sunny on This Afternoon This Afternoon... Sunny, with a high near 96. Light south wind.
Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 63. Light and variable wind.
30% chance of thunderstorms Friday Friday... A slight chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 91. Calm wind becoming west northwest around 5 mph. Chance of precipitation is 30%.
30% chance of thunderstorms Friday Night Friday Night... A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 64. Light and variable wind.
20% chance of thunderstorms Saturday Saturday... A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 91. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
20% chance of thunderstorms Saturday Night Saturday Night... A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Calm wind.
40% chance of thunderstorms Sunday Sunday... A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming southwest 5 to 9 mph in the morning.
20% chance of thunderstorms Sunday Night Sunday Night... A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. South wind around 6 mph.
20% chance of thunderstorms Monday Monday... A chance of showers and thunderstorms. Partly sunny, with a high near 87. South southwest wind 6 to 10 mph.
20% chance of thunderstorms Monday Night Monday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind 3 to 6 mph.
20% chance of thunderstorms Tuesday Tuesday... A chance of showers and thunderstorms. Mostly cloudy, with a high near 84. South wind 3 to 8 mph.
20% chance of thunderstorms Tuesday Night Tuesday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. West southwest wind around 5 mph becoming calm in the evening.
20% chance of Wednesday Wednesday... A chance of showers. Partly sunny, with a high near 81. Light and variable wind becoming east northeast 5 to 9 mph in the morning.
Current Radar Image


Sun Almanac for Denny, Illinois
Sunrise: 06:42 AM
Sunset: 7:00 PM
Civil Sunrise:06:16 AM
Civil Sunset: 7:27 PM
Nautical Sunrise: 05:45 AM
Nautical Sunset: 7:58 PM
Astro Sunrise: 05:13 AM
Astro Sunset: 8:29 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.