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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 10:26 pm CST Jan 12, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Tonight Tuesday Wednesday Thursday Friday Saturday Sunday M.L.King Day
Mostly Clear on Tonight Sunny on Tuesday 20% chance of rain on Wednesday Sunny on Thursday Partly Sunny on Friday Partly Sunny on Saturday Mostly Sunny on Sunday Mostly Sunny on M.L.King Day
Low: 35°F High: 60°F High: 45°F High: 32°F High: 45°F High: 31°F High: 27°F High: 36°F
Low: 40°F Low: 18°F Low: 22°F Low: 20°F Low: 12°F Low: 14°F  
Mostly Clear Sunny Rain Sunny Partly Sunny Partly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
MARION - (KMWA)
41°
Feels like 34°F
Clear
as of 10:15 PM CST
Rel. Humidity: 60%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
10 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
43°
Feels like 37°F
Clear
as of 10:15 PM CST
Rel. Humidity: 56%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
9 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
45°
Feels like 38°F
Clear
as of 9:52 PM CST
Rel. Humidity: 52%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
13 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
39°
Feels like 32°F
Clear
as of 9:56 PM CST
Rel. Humidity: 64%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
12 MPH
220° Southwest
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 35. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Sunny on Tuesday Tuesday... Sunny, with a high near 60. Southwest wind 10 to 14 mph, with gusts as high as 22 mph.
40% chance of rain Tuesday Night Tuesday Night... A 40 percent chance of showers. Mostly cloudy, with a low around 40. Southwest wind 5 to 8 mph becoming west northwest after midnight.
20% chance of rain Wednesday Wednesday... A 20 percent chance of showers before noon. Mostly cloudy, with a high near 45. North northwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 18. North northwest wind 9 to 17 mph, with gusts as high as 24 mph.
Sunny on Thursday Thursday... Sunny, with a high near 32. 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 22. Light southwest wind becoming south southwest 5 to 10 mph in the evening. Winds could gust as high as 20 mph.
Partly Sunny on Friday Friday... Partly sunny, with a high near 45. West wind 9 to 15 mph, with gusts as high as 23 mph.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 20. West wind 7 to 9 mph.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 31. West wind 9 to 14 mph, with gusts as high as 20 mph.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 12. West wind around 9 mph.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 27. West northwest wind 8 to 11 mph, with gusts as high as 18 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 14. West southwest wind around 7 mph.
Mostly Sunny on M.L.King Day M.L.King Day... Mostly sunny, with a high near 36. West wind 6 to 10 mph.
Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:11 AM
Sunset: 4:57 PM
Civil Sunrise:06:42 AM
Civil Sunset: 5:26 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:58 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:30 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.