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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 2:01 pm CST Jan 10, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday
Mostly Sunny on This Afternoon 20% chance of snow on Tonight Sunny on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday
High: 46°F Low: 28°F High: 40°F High: 50°F High: 58°F High: 46°F High: 37°F High: 44°F
Low: 26°F Low: 36°F Low: 40°F Low: 20°F Low: 28°F  
Mostly Sunny Snow Sunny Sunny Mostly Sunny Mostly Cloudy Mostly Sunny Partly Sunny
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Current Conditions at
MARION - (KMWA)
45°
Feels like 37°F
Mostly Cloudy
as of 1:47 PM CST
Rel. Humidity: 61%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: MVFR
Wind Data
16 MPH
Gust: 23 MPH
310° Northwest
Cloud Level(s): Broken at 3000ft, Broken at 3600ft
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
45°
Feels like 37°F
Cloudy
as of 2:15 PM CST
Rel. Humidity: 56%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 21 MPH
310° Northwest
Cloud Level(s): Solid Overcast at 3100ft
Current Conditions at
CARBONDALE - (KMDH)
45°
Feels like 37°F
Mostly Cloudy
as of 1:52 PM CST
Rel. Humidity: 56%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 25 MPH
330° Northwest
Cloud Level(s): Broken at 3800ft
Current Conditions at
MT VERNON - (KMVN)
43°
Feels like 36°F
Cloudy
as of 1:56 PM CST
Rel. Humidity: 60%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 20 MPH
290° West
Cloud Level(s): Solid Overcast at 3400ft
Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 46. West wind 6 to 10 mph, with gusts as high as 26 mph.
20% chance of snow Tonight Tonight... A slight chance of rain showers before midnight, then a slight chance of sprinkles between midnight and 2am, then a slight chance of flurries after 2am. Increasing clouds, with a low around 28. West southwest wind 5 to 10 mph becoming northwest 13 to 18 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Sunny on Sunday Sunday... Sunny, with a high near 40. Northwest wind 6 to 15 mph, with gusts as high as 28 mph.
Clear on Sunday Night Sunday Night... Clear, with a low around 26. Calm wind becoming south southwest around 5 mph after midnight.
Sunny on Monday Monday... Sunny, with a high near 50. Southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 36. South southwest wind 6 to 8 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 58. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.
10% chance of rain Tuesday Night Tuesday Night... A slight chance of showers after midnight. Mostly cloudy, with a low around 40. West southwest wind 6 to 10 mph.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 46. North northwest wind 6 to 13 mph, with gusts as high as 20 mph.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 20. North northwest wind 6 to 10 mph.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 37. North northwest wind 5 to 8 mph becoming west southwest in the afternoon.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 28. South southwest wind 5 to 7 mph.
Partly Sunny on Friday Friday... Partly sunny, with a high near 44. Southwest wind 8 to 14 mph, with gusts as high as 21 mph.
Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:11 AM
Sunset: 4:55 PM
Civil Sunrise:06:42 AM
Civil Sunset: 5:24 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:57 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:28 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.