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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 Dec 13, 2025 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday
20% chance of snow on This Afternoon Partly Cloudy on Tonight Sunny on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Sunny on Wednesday Rain on Thursday Mostly Sunny on Friday
High: 36°F Low: 7 °F High: 17°F High: 36°F High: 48°F High: 53°F High: 59°F High: 44°F
Low: 8 °F Low: 25°F Low: 36°F Low: 44°F Low: 27°F  
Snow Partly Cloudy Sunny Sunny Mostly Sunny Mostly Sunny Rain Mostly Sunny
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Current Conditions at
MARION - (KMWA)
27°
Feels like 14°F
Cloudy
Mist
as of 2:45 PM CST
Rel. Humidity: 100%
Dew Point: 27°F
Visibility: 1/2 Miles
Pressure: 30.18 in.
Flight Rule: IFR
Wind Data
16 MPH
020° North
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
27°
Feels like 15°F
Cloudy
Mist
as of 2:55 PM CST
Rel. Humidity: 86%
Dew Point: 23°F
Visibility: 3 Miles
Pressure: 30.20 in.
Flight Rule: IFR
Wind Data
14 MPH
0° North
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
CARBONDALE - (KMDH)
27°
Feels like 15°F
Cloudy
Mist
as of 2:52 PM CST
Rel. Humidity: 92%
Dew Point: 25°F
Visibility: 1 1/2 Miles
Pressure: 30.20 in.
Flight Rule: IFR
Wind Data
14 MPH
010° North
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
MT VERNON - (KMVN)
Cloudy
as of 2:56 PM CST
Visibility: 10 Miles
Pressure: 30.21 in.
Flight Rule: MVFR
Wind Data
7 MPH
010° North
Cloud Level(s): Solid Overcast at 1300ft
20% chance of snow This Afternoon This Afternoon... A 20 percent chance of snow. Cloudy, with a high near 36. North wind around 11 mph.
Partly Cloudy on Tonight Tonight... Cloudy, then gradually becoming partly cloudy, with a low around 7. Wind chill values as low as -6. North wind 11 to 13 mph, with gusts as high as 21 mph.
Sunny on Sunday Sunday... Sunny, with a high near 17. Wind chill values as low as -8. North wind 6 to 13 mph, with gusts as high as 20 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 8. Light and variable wind.
Sunny on Monday Monday... Sunny, with a high near 36. South southwest wind 5 to 14 mph, with gusts as high as 21 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 25. South southwest wind 5 to 9 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 48. South southwest wind 5 to 10 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 36. Southwest wind 7 to 9 mph.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 53. South southwest wind 6 to 9 mph.
20% chance of thunderstorms Wednesday Night Wednesday Night... A slight chance of showers, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 44. South wind 8 to 15 mph, with gusts as high as 24 mph.
Rain on Thursday Thursday... Showers likely. Mostly cloudy, with a high near 59. South wind 11 to 17 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 27. West northwest wind 5 to 10 mph becoming light northwest after midnight.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 44. Light and variable wind becoming east southeast 5 to 8 mph in the morning.
Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:03 AM
Sunset: 4:37 PM
Civil Sunrise:06:34 AM
Civil Sunset: 5:06 PM
Nautical Sunrise: 06:01 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:29 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.