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

MouseOver for Detail Forecast
Today Tonight Sunday Monday Tuesday Wednesday Thursday Friday
20% chance of freezing rain on Today 20% chance of freezing rain on Tonight Sunny on Sunday Sunny on Monday Sunny on Tuesday Partly Sunny on Wednesday Rain on Thursday 10% chance of rain on Friday
High: 24 °F Low: 8 °F High: 17°F High: 35°F High: 48°F High: 54°F High: 58°F High: 46°F
Low: 9 °F Low: 24°F Low: 35°F Low: 45°F Low: 28°F  
Freezing Rain Freezing Rain Sunny Sunny Sunny Partly Sunny Rain Rain
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Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
34°
Cloudy
as of 3:55 AM CST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 7 Miles
Pressure: 30.19 in.
Flight Rule: MVFR
Wind Data
3 MPH
0° North
Cloud Level(s): Solid Overcast at 1000ft
Current Conditions at
CARBONDALE - (KMDH)
34°
Cloudy
Mist
as of 3:52 AM CST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 5 Miles
Pressure: 30.17 in.
Flight Rule: MVFR
Wind Data
3 MPH
010° North
Cloud Level(s): Solid Overcast at 1100ft
Current Conditions at
MT VERNON - (KMVN)
Cloudy
as of 3:56 AM CST
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: MVFR
Wind Data
3 MPH
Cloud Level(s): Solid Overcast at 1300ft
20% chance of freezing rain Today Today... A slight chance of drizzle or freezing rain between 11am and 1pm, then a slight chance of freezing rain after 1pm. Cloudy, with a temperature falling to around 24 by 5pm. Light northwest wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 20%.
20% chance of freezing rain Tonight Tonight... A slight chance of freezing rain before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Wind chill values as low as -6. North wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Sunny on Sunday Sunday... Sunny, with a high near 17. Wind chill values as low as -8. North wind 5 to 13 mph, with gusts as high as 22 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 9. Calm wind.
Sunny on Monday Monday... Sunny, with a high near 35. Light south wind becoming south southwest 8 to 13 mph in the morning. Winds could gust as high as 18 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 24. Southwest wind 5 to 8 mph.
Sunny on Tuesday Tuesday... Sunny, with a high near 48. South southwest wind 6 to 10 mph.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 35. South southwest wind around 9 mph.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 54. South southwest wind 8 to 10 mph.
20% chance of rain Wednesday Night Wednesday Night... A chance of showers. Mostly cloudy, with a low around 45. South wind 10 to 14 mph, with gusts as high as 23 mph.
Rain on Thursday Thursday... Showers likely. Mostly cloudy, with a high near 58. South southwest wind 9 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
10% chance of rain Thursday Night Thursday Night... A slight chance of showers. Partly cloudy, with a low around 28. Northwest wind 5 to 8 mph becoming light and variable after midnight.
10% chance of rain Friday Friday... A slight chance of showers. Mostly sunny, with a high near 46. Light and variable wind becoming east southeast 5 to 7 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.