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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 4:06 am CST Jan 17, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

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Overnight Saturday Sunday M.L.King Day Tuesday Wednesday Thursday Friday
20% chance of snow on Overnight 30% chance of snow on Saturday Increasing Clouds on Sunday Mostly Sunny on M.L.King Day Sunny on Tuesday Partly Sunny on Wednesday 10% chance of rain & snow on Thursday 10% chance of rain on Friday
Low: 28°F High: 31°F High: 32°F High: 24°F High: 36°F High: 46°F High: 36°F High: 37°F
Low: 13°F Low: 15°F Low: 11°F Low: 28°F Low: 23°F Low: 19°F  
Snow Snow Increasing Clouds Mostly Sunny Sunny Partly Sunny Rain & Snow Rain
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Current Conditions at
MARION - (KMWA)
27°
Clear
as of 3:55 AM CST
Rel. Humidity: 58%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
3 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
27°
Clear
as of 3:55 AM CST
Rel. Humidity: 63%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
5 MPH
290° West
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
27°
Clear
as of 3:52 AM CST
Rel. Humidity: 49%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
6 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
23°
Clear
as of 3:56 AM CST
Rel. Humidity: 62%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
3 MPH
240° Southwest
Cloud Level(s): Clear
20% chance of snow Overnight Overnight... A chance of flurries. Mostly clear, with a steady temperature around 28. West northwest wind around 6 mph, with gusts as high as 20 mph.

30% chance of snow Saturday Saturday... A chance of flurries with a slight chance of snow showers before 10am, then a chance of snow showers between 10am and 1pm, then a chance of flurries after 1pm. Partly sunny, with a high near 31. West northwest wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 13. West northwest wind 6 to 10 mph, with gusts as high as 20 mph.

Increasing Clouds on Sunday Sunday... Increasing clouds, with a high near 32. Light west wind becoming southwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 15. South southwest wind 8 to 11 mph becoming northwest after midnight. Winds could gust as high as 21 mph.

Mostly Sunny on M.L.King Day M.L.King Day... Mostly sunny, with a high near 24. Northwest wind 6 to 14 mph, with gusts as high as 22 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 11. Light and variable wind.

Sunny on Tuesday Tuesday... Sunny, with a high near 36. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 28. South wind 10 to 14 mph, with gusts as high as 25 mph.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 46. Southwest wind 7 to 14 mph, with gusts as high as 24 mph.

10% chance of rain & snow Wednesday Night Wednesday Night... A slight chance of rain and snow showers. Mostly cloudy, with a low around 23. West southwest wind around 6 mph becoming north after midnight.

10% chance of rain & snow Thursday Thursday... A slight chance of rain and snow showers. Mostly sunny, with a high near 36. North northwest wind 5 to 7 mph.

10% chance of snow Thursday Night Thursday Night... A slight chance of snow showers. Partly cloudy, with a low around 19. Light and variable wind becoming east around 5 mph after midnight.

10% chance of rain Friday Friday... A slight chance of showers. Mostly sunny, with a high near 37. Southeast wind 5 to 8 mph becoming southwest in the afternoon.

Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:09 AM
Sunset: 5:02 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:31 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 6:03 PM
Astro Sunrise: 05:37 AM
Astro Sunset: 6:35 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.