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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 8:33 pm CST Jan 8, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
90% chance of thunderstorms on Tonight Partly Sunny on Friday 20% chance of rain on Saturday Sunny on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Thursday
Low: 53°F High: 51 °F High: 48°F High: 36°F High: 47°F High: 54°F High: 44°F High: 37°F
Low: 42°F Low: 27°F Low: 23°F Low: 34°F Low: 36°F Low: 25°F  
Thunderstorms Partly Sunny Rain Sunny Sunny Mostly Sunny Mostly Cloudy Mostly Sunny
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Current Conditions at
MARION - (KMWA)
68°
Cloudy
as of 9:35 PM CST
Rel. Humidity: 72%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 29.68 in.
Flight Rule: MVFR
Wind Data
29 MPH
Gust: 36 MPH
190° South
Cloud Level(s): Broken at 2800ft, Solid Overcast at 3900ft
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
70°
Cloudy
as of 9:35 PM CST
Rel. Humidity: 68%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 29.69 in.
Flight Rule: VFR
Wind Data
21 MPH
Gust: 35 MPH
190° South
Cloud Level(s): Scattered at 3000ft, Broken at 3800ft, Solid Overcast at 4700ft
Current Conditions at
CARBONDALE - (KMDH)
68°
Cloudy
as of 8:52 PM CST
Rel. Humidity: 77%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.65 in.
Flight Rule: VFR
Wind Data
30 MPH
Gust: 49 MPH
190° South
Cloud Level(s): Few at 2700ft, Broken at 3200ft, Solid Overcast at 5000ft
Current Conditions at
MT VERNON - (KMVN)
66°
Cloudy
as of 8:56 PM CST
Rel. Humidity: 77%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 29.63 in.
Flight Rule: MVFR
Wind Data
24 MPH
Gust: 33 MPH
190° South
Cloud Level(s): Solid Overcast at 2600ft
90% chance of thunderstorms Tonight Tonight... Showers and possibly a thunderstorm before 1am, then a chance of showers between 1am and 2am. Low around 53. Breezy, with a south wind 14 to 22 mph becoming west after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 90%.
Partly Sunny on Friday Friday... Partly sunny, with a temperature falling to around 51 by 5pm. West wind 5 to 13 mph becoming north northeast in the afternoon. Winds could gust as high as 24 mph.
30% chance of rain Friday Night Friday Night... A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 42. Calm wind.
20% chance of rain Saturday Saturday... A 20 percent chance of showers before noon. Cloudy through mid morning, then gradual clearing, with a high near 48. Light northwest wind becoming west northwest 9 to 14 mph in the morning. Winds could gust as high as 20 mph.
Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 27. West northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Sunny on Sunday Sunday... Sunny, with a high near 36. Northwest wind 5 to 14 mph, with gusts as high as 21 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 23. Light and variable wind.
Sunny on Monday Monday... Sunny, with a high near 47. South southwest wind 5 to 13 mph, with gusts as high as 18 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 34. South southwest wind 6 to 8 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 54. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.
10% chance of rain Tuesday Night Tuesday Night... A slight chance of showers. Mostly cloudy, with a low around 36. West southwest wind 6 to 9 mph.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 44. Northwest wind 6 to 10 mph.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 25. North northwest wind around 7 mph.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 37. North northwest wind 6 to 8 mph.
Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:12 AM
Sunset: 4:53 PM
Civil Sunrise:06:43 AM
Civil Sunset: 5:22 PM
Nautical Sunrise: 06:10 AM
Nautical Sunset: 5:55 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:27 PM
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