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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Click for Hazardous Weather Outlook for Frankfort, Illinois
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 6:06 pm CST Jan 19, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Tonight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Tonight Sunny on Tuesday Mostly Cloudy on Wednesday Mostly Sunny on Thursday Mostly Cloudy on Friday 20% chance of snow on Saturday 10% chance of snow on Sunday Sunny on Monday
Low: 12°F High: 37°F High: 47°F High: 39°F High: 25°F High: 16°F High: 24°F High: 33°F
Low: 34 °F Low: 25°F Low: 16°F Low: 5 °F Low: 7 °F Low: 8 °F  
Mostly Clear Sunny Mostly Cloudy Mostly Sunny Mostly Cloudy Snow Snow Sunny
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Current Conditions at
MARION - (KMWA)
18°
Mostly Clear
as of 5:45 PM CST
Rel. Humidity: 44%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.40 in.
Flight Rule: VFR
Wind Data
5 MPH
320° Northwest
Cloud Level(s): Few at 12000ft
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
19°
Clear
as of 5:55 PM CST
Rel. Humidity: 34%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
21°
Clear
as of 5:52 PM CST
Rel. Humidity: 32%
Dew Point: -4°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
18°
Clear
as of 5:56 PM CST
Rel. Humidity: 44%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 12. Light and variable wind.
Sunny on Tuesday Tuesday... Sunny, with a high near 37. Light south southwest wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 22 mph.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a temperature rising to around 34 by 4am. South wind 7 to 14 mph, with gusts as high as 26 mph.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, then gradually becoming sunny, with a high near 47. Southwest wind 6 to 14 mph, with gusts as high as 26 mph.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 25. Calm wind becoming west southwest around 5 mph after midnight.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 39. North northwest wind 3 to 6 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 16. Calm wind becoming north 5 to 7 mph after midnight.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 25. North wind 8 to 11 mph, with gusts as high as 18 mph.
20% chance of snow Friday Night Friday Night... A chance of snow showers. Mostly cloudy, with a low around 5. North northeast wind around 11 mph, with gusts as high as 21 mph.
20% chance of snow Saturday Saturday... A chance of snow showers. Mostly cloudy, with a high near 16. North northeast wind around 10 mph, with gusts as high as 20 mph.
20% chance of snow Saturday Night Saturday Night... A chance of snow showers. Mostly cloudy, with a low around 7. North wind 6 to 8 mph.
10% chance of snow Sunday Sunday... A slight chance of snow showers. Mostly sunny, with a high near 24. North northwest wind 5 to 7 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 8. Light and variable wind.
Sunny on Monday Monday... Sunny, with a high near 33. West southwest wind 3 to 7 mph.
Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:08 AM
Sunset: 5:04 PM
Civil Sunrise:06:40 AM
Civil Sunset: 5:33 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 6:05 PM
Astro Sunrise: 05:36 AM
Astro Sunset: 6:36 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.