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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 10:27 am CST Jan 2, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Saturday Sunday Monday Tuesday Wednesday Thursday
Cloudy on Today Mostly Cloudy on Tonight Mostly Cloudy on Saturday Mostly Sunny on Sunday Sunny on Monday Partly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of rain on Thursday
High: 38°F Low: 29°F High: 42°F High: 41°F High: 55°F High: 62°F High: 61°F High: 62°F
Low: 25°F Low: 31°F Low: 44°F Low: 42°F Low: 47°F  
Cloudy Mostly Cloudy Mostly Cloudy Mostly Sunny Sunny Partly Sunny Partly Sunny Rain
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Current Conditions at
MARION - (KMWA)
34°
Cloudy
as of 10:45 AM CST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: MVFR
Wind Data
6 MPH
050° Northeast
Cloud Level(s): Solid Overcast at 1600ft
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
34°
Cloudy
as of 10:55 AM CST
Rel. Humidity: 74%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: MVFR
Wind Data
8 MPH
070° East
Cloud Level(s): Solid Overcast at 1400ft
Current Conditions at
CARBONDALE - (KMDH)
34°
Feels like 26°F
Mostly Cloudy
as of 10:52 AM CST
Rel. Humidity: 74%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.94 in.
Flight Rule: MVFR
Wind Data
9 MPH
050° Northeast
Cloud Level(s): Broken at 1700ft
Current Conditions at
MT VERNON - (KMVN)
30°
Cloudy
as of 10:56 AM CST
Rel. Humidity: 86%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.96 in.
Flight Rule: MVFR
Wind Data
8 MPH
040° Northeast
Cloud Level(s): Solid Overcast at 1000ft
Cloudy on Today Today... Cloudy, with a high near 38. Northeast wind around 6 mph.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 29. Northeast wind 3 to 5 mph.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, then gradually becoming sunny, with a high near 42. North northeast wind 5 to 7 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 25. Light north northwest wind.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 41. Calm wind.
Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 31. Calm wind becoming south around 6 mph after midnight.
Sunny on Monday Monday... Sunny, with a high near 55. South southwest wind 6 to 11 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 44. South southwest wind 6 to 8 mph.
Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 62. Southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 42. South southwest wind around 6 mph becoming calm in the evening.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 61. Calm wind becoming southwest around 5 mph.
20% chance of rain Wednesday Night Wednesday Night... A chance of showers. Mostly cloudy, with a low around 47. Calm wind becoming southeast around 5 mph after midnight.
20% chance of rain Thursday Thursday... A chance of showers. Mostly cloudy, with a high near 62. South southeast wind 6 to 9 mph.
Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:12 AM
Sunset: 4:48 PM
Civil Sunrise:06:42 AM
Civil Sunset: 5:17 PM
Nautical Sunrise: 06:09 AM
Nautical Sunset: 5:50 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:22 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.