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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 1:01 am CST Dec 12, 2025 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Overnight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
Cloudy on Overnight Partly Sunny on Friday Mostly Cloudy on Saturday Sunny on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Cloudy on Wednesday 20% chance of  on Thursday
Low: 32°F High: 42°F High: 35°F High: 17°F High: 35°F High: 47°F High: 55°F High: 58°F
Low: 27°F Low: 7 °F Low: 7 °F Low: 24°F Low: 37°F Low: 48°F  
Cloudy Partly Sunny Mostly Cloudy Sunny Sunny Mostly Sunny Mostly Cloudy Partly Sunny
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Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
36°
Cloudy
as of 2:15 AM CST
Rel. Humidity: 80%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
8 MPH
110° East
Cloud Level(s): Solid Overcast at 8000ft
Current Conditions at
CARBONDALE - (KMDH)
34°
Clear
as of 1:52 AM CST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
6 MPH
090° East
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
Cloudy
Haze
as of 1:56 AM CST
Visibility: 6 Miles
Pressure: 29.95 in.
Flight Rule: IFR
Wind Data
10 MPH
060° Northeast
Cloud Level(s): Broken at 600ft, Solid Overcast at 7500ft
Cloudy on Overnight Overnight... Partly cloudy, with a low around 32. East northeast wind 5 to 7 mph.

Partly Sunny on Friday Friday... Partly sunny, with a high near 42. East northeast wind 6 to 9 mph becoming north northwest in the afternoon.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 27. North northwest wind around 6 mph becoming calm in the evening.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 35. Calm wind becoming north 5 to 9 mph in the morning.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 7. North northwest wind around 11 mph, with gusts as high as 20 mph.

Sunny on Sunday Sunday... Sunny, with a high near 17. North northwest wind 6 to 11 mph, with gusts as high as 20 mph.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 7. Light and variable wind.

Sunny on Monday Monday... Sunny, with a high near 35. Light south wind becoming south southwest 5 to 10 mph in the morning.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 24. South southwest wind around 6 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 47. South southwest wind 6 to 10 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 37. South southwest wind around 8 mph.

Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 55. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.

20% chance of rain Wednesday Night Wednesday Night... A chance of showers. Mostly cloudy, with a low around 48. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.

20% chance of  Thursday Thursday... A chance of showers. Partly sunny, with a high near 58. South southwest wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:02 AM
Sunset: 4:37 PM
Civil Sunrise:06:33 AM
Civil Sunset: 5:06 PM
Nautical Sunrise: 06:00 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:28 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.