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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 7:47 am CST Jan 11, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Sunny on Today Clear on Tonight Sunny on Monday Mostly Sunny on Tuesday 20% chance of  on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday Partly Sunny on Saturday
High: 40°F Low: 26°F High: 51°F High: 59°F High: 45°F High: 37°F High: 44°F High: 36°F
Low: 36°F Low: 41°F Low: 19°F Low: 26°F Low: 24°F  
Sunny Clear Sunny Mostly Sunny Partly Sunny Mostly Sunny Partly Sunny Partly Sunny
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Current Conditions at
MARION - (KMWA)
30°
Feels like 18°F
Clear
as of 8:47 AM CST
Rel. Humidity: 58%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.46 in.
Flight Rule: VFR
Wind Data
17 MPH
340° North
Cloud Level(s): Clear
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
32°
Feels like 21°F
Mostly Cloudy
as of 8:55 AM CST
Rel. Humidity: 50%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.46 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 24 MPH
340° North
Cloud Level(s): Broken at 3100ft
Current Conditions at
CARBONDALE - (KMDH)
30°
Feels like 19°F
Clear
as of 8:52 AM CST
Rel. Humidity: 54%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.47 in.
Flight Rule: VFR
Wind Data
15 MPH
340° North
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
28°
Partly Cloudy
as of 8:56 AM CST
Rel. Humidity: 63%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.46 in.
Flight Rule: VFR
Wind Data
3 MPH
Cloud Level(s): Scattered at 2900ft
Sunny on Today Today... Sunny, with a high near 40. Northwest wind 6 to 14 mph, with gusts as high as 26 mph.

Clear on Tonight Tonight... Clear, with a low around 26. Calm wind becoming south southwest around 6 mph after midnight.

Sunny on Monday Monday... Sunny, with a high near 51. South southwest wind 6 to 10 mph, with gusts as high as 18 mph.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 36. South southwest wind 6 to 8 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 59. Southwest wind 9 to 15 mph, with gusts as high as 23 mph.

20% chance of rain Tuesday Night Tuesday Night... A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. West wind 6 to 10 mph.

20% chance of  Wednesday Wednesday... A 20 percent chance of showers after noon. Partly sunny, with a high near 45. Northwest wind 6 to 14 mph, with gusts as high as 23 mph.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 19. North northwest wind 7 to 11 mph, with gusts as high as 21 mph.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 37. North northwest wind 5 to 8 mph becoming west southwest in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 26. South southwest wind 5 to 8 mph.

Partly Sunny on Friday Friday... Partly sunny, with a high near 44. West wind 8 to 13 mph, with gusts as high as 21 mph.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 24. West wind around 7 mph.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 36. West wind 7 to 11 mph.

Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:11 AM
Sunset: 4:56 PM
Civil Sunrise:06:42 AM
Civil Sunset: 5:25 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:58 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:29 PM
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