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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 3:16 am CST Dec 14, 2025 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Sunny on Today Mostly Clear on Tonight Sunny on Monday Sunny on Tuesday Mostly Sunny on Wednesday Rain on Thursday Mostly Sunny on Friday 20% chance of  on Saturday
High: 17°F Low: 8 °F High: 36°F High: 47°F High: 54°F High: 60°F High: 42°F High: 58°F
Low: 26°F Low: 36°F Low: 44°F Low: 25°F Low: 33°F  
Sunny Mostly Clear Sunny Sunny Mostly Sunny Rain Mostly Sunny Partly Sunny
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Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
10°
Feels like -2°F
Clear
as of 4:15 AM CST
Rel. Humidity: 60%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.56 in.
Flight Rule: VFR
Wind Data
9 MPH
Gust: 16 MPH
340° North
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
Feels like -7°F
Clear
as of 3:52 AM CST
Rel. Humidity: 71%
Dew Point: 1°F
Visibility: 10 Miles
Pressure: 30.57 in.
Flight Rule: VFR
Wind Data
13 MPH
Gust: 20 MPH
340° North
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
Clear
as of 3:56 AM CST
Visibility: 10 Miles
Pressure: 30.56 in.
Flight Rule: VFR
Wind Data
5 MPH
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 17. Wind chill values as low as -8. North wind 6 to 13 mph, with gusts as high as 22 mph.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 8. Calm wind becoming south around 5 mph after midnight.

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 26. South southwest wind 5 to 9 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 47. South southwest wind 5 to 10 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 36. Southwest wind 6 to 8 mph.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 54. Southwest wind 6 to 8 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 7 to 15 mph, with gusts as high as 26 mph.

Rain on Thursday Thursday... Showers likely, mainly before noon. Mostly cloudy, with a high near 60. 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 25. West northwest wind 5 to 10 mph becoming light northwest after midnight.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 42. Light and variable wind becoming south 5 to 8 mph in the morning.

10% chance of rain Friday Night Friday Night... A slight chance of showers. Mostly cloudy, with a low around 33. South wind 6 to 9 mph.

20% chance of  Saturday Saturday... A chance of showers. Partly sunny, with a high near 58. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:04 AM
Sunset: 4:37 PM
Civil Sunrise:06:34 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 06:01 AM
Nautical Sunset: 5:40 PM
Astro Sunrise: 05:29 AM
Astro Sunset: 6:12 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.