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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 9:41 pm CST Dec 16, 2025 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Mostly Cloudy on Tonight Partly Sunny on Wednesday 100% chance of thunderstorms on Thursday Sunny on Friday Mostly Sunny on Saturday Partly Sunny on Sunday Partly Sunny on Monday Partly Sunny on Tuesday
Low: 37°F High: 54°F High: 56°F High: 39°F High: 55°F High: 47°F High: 51°F High: 57°F
Low: 51 °F Low: 24°F Low: 32°F Low: 33°F Low: 32°F Low: 41°F  
Mostly Cloudy Partly Sunny Thunderstorms Sunny Mostly Sunny Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
MARION - (KMWA)
46°
Feels like 41°F
Clear
as of 10:35 PM CST
Rel. Humidity: 26%
Dew Point: 14°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: VFR
Wind Data
9 MPH
Gust: 20 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
46°
Feels like 41°F
Clear
as of 10:35 PM CST
Rel. Humidity: 24%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 16 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
46°
Feels like 39°F
Clear
as of 9:52 PM CST
Rel. Humidity: 33%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 26 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
Clear
as of 9:56 PM CST
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
10 MPH
200° South
Cloud Level(s): Clear
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 37. Southwest wind 7 to 10 mph.

Partly Sunny on Wednesday Wednesday... Partly sunny, then gradually becoming sunny, with a high near 54. Southwest wind 5 to 7 mph.

50% chance of rain Wednesday Night Wednesday Night... A 50 percent chance of showers after midnight. Increasing clouds, with a temperature rising to around 51 by 5am. South wind 6 to 15 mph, with gusts as high as 25 mph.

100% chance of thunderstorms Thursday Thursday... Showers and possibly a thunderstorm before noon, then showers likely. High near 56. South wind 14 to 17 mph becoming west northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 100%.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 24. West northwest wind 8 to 14 mph, with gusts as high as 23 mph.

Sunny on Friday Friday... Sunny, with a high near 39. West northwest wind around 7 mph becoming south in the afternoon.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 32. South wind 6 to 13 mph, with gusts as high as 22 mph.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 55. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 33. Southwest wind 6 to 8 mph becoming north northwest after midnight.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 47. North wind 6 to 8 mph.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 32. East wind 3 to 6 mph.

Partly Sunny on Monday Monday... Partly sunny, with a high near 51. East southeast wind 5 to 7 mph.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 41. Light and variable wind becoming south southwest around 6 mph after midnight.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 57. Southwest wind 6 to 8 mph.

Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:06 AM
Sunset: 4:38 PM
Civil Sunrise:06:36 AM
Civil Sunset: 5:08 PM
Nautical Sunrise: 06:03 AM
Nautical Sunset: 5:41 PM
Astro Sunrise: 05:31 AM
Astro Sunset: 6:13 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.