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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 10:36 pm CST Dec 5, 2025 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Overnight Saturday Sunday Monday Tuesday Wednesday Thursday Friday
Mostly Cloudy on Overnight Mostly Sunny on Saturday 20% chance of rain on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday 20% chance of  on Wednesday Mostly Cloudy on Thursday Partly Sunny on Friday
Low: 28°F High: 45°F High: 46°F High: 36°F High: 48°F High: 48°F High: 43°F High: 36°F
Low: 37°F Low: 23°F Low: 23°F Low: 38°F Low: 28°F Low: 25°F  
Mostly Cloudy Mostly Sunny Rain Mostly Sunny Mostly Sunny Partly Sunny Mostly Cloudy Partly Sunny
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Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
30°
Clear
as of 12:35 AM CST
Rel. Humidity: 80%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
6 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
30°
Feels like 21°F
Clear
as of 11:52 PM CST
Rel. Humidity: 86%
Dew Point: 27°F
Visibility: 7 Miles
Pressure: 29.96 in.
Flight Rule: VFR
Wind Data
9 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
Cloudy
as of 11:56 PM CST
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: VFR
Wind Data
8 MPH
220° Southwest
Cloud Level(s): Solid Overcast at 11000ft
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a low around 28. Southwest wind 3 to 6 mph.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 45. Light and variable wind.

Cloudy on Saturday Night Saturday Night... Cloudy, with a steady temperature around 37. Light southeast wind.

20% chance of rain Sunday Sunday... A 20 percent chance of showers before noon. Mostly cloudy, with a high near 46. Light and variable wind becoming north 5 to 10 mph in the morning.

30% chance of snow Sunday Night Sunday Night... A chance of snow showers, mixing with rain after 9pm, then gradually ending. Mostly cloudy, with a low around 23. North wind 6 to 10 mph. Chance of precipitation is 30%.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 36. North wind around 6 mph becoming calm in the afternoon.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 23. Calm wind becoming south southwest 5 to 8 mph after midnight.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 48. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 38. South southwest wind 10 to 14 mph, with gusts as high as 22 mph.

20% chance of  Wednesday Wednesday... A chance of showers. Partly sunny, with a high near 48. West northwest wind 9 to 15 mph, with gusts as high as 23 mph.

10% chance of rain Wednesday Night Wednesday Night... A slight chance of showers. Mostly cloudy, with a low around 28. West northwest wind 6 to 8 mph.

Mostly Cloudy on Thursday Thursday... Mostly cloudy, with a high near 43. North wind 7 to 9 mph becoming south southwest in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 25. South southwest wind 5 to 7 mph becoming northwest after midnight.

Partly Sunny on Friday Friday... Partly sunny, with a high near 36. Northwest wind 7 to 10 mph.

Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 06:58 AM
Sunset: 4:36 PM
Civil Sunrise:06:28 AM
Civil Sunset: 5:05 PM
Nautical Sunrise: 05:56 AM
Nautical Sunset: 5:38 PM
Astro Sunrise: 05:24 AM
Astro Sunset: 6:10 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.