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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 4:51 pm CST Dec 25, 2025 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday New Year's Day
Patchy Fog on Tonight Morning Fog on Friday Partly Sunny on Saturday 60% chance of thunderstorms on Sunday Mostly Sunny on Monday Sunny on Tuesday Mostly Sunny on Wednesday Sunny on New Year's Day
Low: 61°F High: 73°F High: 69°F High: 71°F High: 30°F High: 34°F High: 41°F High: 40°F
Low: 48°F Low: 61°F Low: 25°F Low: 19°F Low: 24°F Low: 25°F  
Patchy Fog Morning Fog Partly Sunny Thunderstorms Mostly Sunny Sunny Mostly Sunny Sunny
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Current Conditions at
MARION - (KMWA)
61°
Cloudy
Mist
as of 5:45 PM CST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 2 1/2 Miles
Pressure: 30.00 in.
Flight Rule: IFR
Wind Data
6 MPH
170° South
Cloud Level(s): Solid Overcast at 500ft
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
61°
Cloudy
Mist
as of 6:15 PM CST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 4 Miles
Pressure: 30.01 in.
Flight Rule: IFR
Wind Data
5 MPH
190° South
Cloud Level(s): Broken at 600ft, Solid Overcast at 1100ft
Current Conditions at
CARBONDALE - (KMDH)
61°
Cloudy
as of 5:52 PM CST
Rel. Humidity: 93%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: IFR
Wind Data
8 MPH
180° South
Cloud Level(s): Solid Overcast at 700ft
Current Conditions at
MT VERNON - (KMVN)
63°
Cloudy
Mist
as of 5:56 PM CST
Rel. Humidity: 88%
Dew Point: 59°F
Visibility: 6 Miles
Pressure: 29.99 in.
Flight Rule: IFR
Wind Data
8 MPH
170° South
Cloud Level(s): Solid Overcast at 600ft
Patchy Fog on Tonight Tonight... Patchy fog between 7pm and 8pm. Otherwise, mostly cloudy, with a low around 61. South wind 5 to 9 mph, with gusts as high as 18 mph.
Morning Fog on Friday Friday... Patchy fog between 8am and 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 73. South southwest wind 7 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 48. Calm wind.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 69. Calm wind becoming southeast 5 to 8 mph in the morning.
20% chance of rain Saturday Night Saturday Night... A 20 percent chance of showers. Cloudy, with a low around 61. South southwest wind 7 to 9 mph.
60% chance of thunderstorms Sunday Sunday... A chance of showers, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 71. South southwest wind 9 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
80% chance of rain & snow Sunday Night Sunday Night... Rain showers before midnight, then a chance of rain and snow showers. Low around 25. West southwest wind 16 to 18 mph becoming northwest in the evening. Winds could gust as high as 29 mph. Chance of precipitation is 80%.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 30. Northwest wind 13 to 18 mph, with gusts as high as 29 mph.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 19. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunny on Tuesday Tuesday... Sunny, with a high near 34. Northwest wind 6 to 8 mph becoming southwest in the afternoon.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 24. Southwest wind around 5 mph.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 41. West southwest wind 5 to 8 mph.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 25. Southwest wind around 6 mph.
Sunny on New Year's Day New Year's Day... Sunny, with a high near 40. West wind 6 to 8 mph.
Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:10 AM
Sunset: 4:42 PM
Civil Sunrise:06:40 AM
Civil Sunset: 5:12 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 5:45 PM
Astro Sunrise: 05:35 AM
Astro Sunset: 6:17 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.