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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 8:31 pm CST Jan 27, 2026 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
Cloudy on Tonight Morning Fog on Wednesday Mostly Cloudy on Thursday Mostly Sunny on Friday Mostly Sunny on Saturday Partly Sunny on Sunday Partly Sunny on Monday Partly Sunny on Tuesday
Low: 0 °F High: 28°F High: 26°F High: 17°F High: 17°F High: 26°F High: 33°F High: 34°F
Low: 11°F Low: 8 °F Low: 2 °F Low: 2 °F Low: 13°F Low: 16°F  
Cloudy Morning Fog Mostly Cloudy Mostly Sunny Mostly Sunny Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
MARION - (KMWA)
25°
Clear
as of 8:35 PM CST
Rel. Humidity: 45%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
18°
Clear
as of 8:35 PM CST
Rel. Humidity: 61%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.41 in.
Flight Rule: VFR
Wind Data
5 MPH
330° Northwest
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
25°
Clear
as of 7:52 PM CST
Rel. Humidity: 53%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 30.40 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MT VERNON - (KMVN)
19°
Clear
as of 7:56 PM CST
Rel. Humidity: 62%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.40 in.
Flight Rule: VFR
Wind Data
3 MPH
Cloud Level(s): Clear
Cloudy on Tonight Tonight... Partly cloudy, with a low around 0. Calm wind.

Morning Fog on Wednesday Wednesday... Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 28. Wind chill values as low as zero. Calm wind becoming west southwest around 6 mph.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 11. Calm wind.

Mostly Cloudy on Thursday Thursday... Mostly cloudy, with a high near 26. Calm wind becoming northeast around 6 mph in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 8. North wind 3 to 5 mph.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 17. North wind 5 to 10 mph.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 2. North wind 6 to 8 mph.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 17. Northwest wind 6 to 10 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 2. Northwest wind around 5 mph becoming calm in the evening.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 26. Calm wind becoming west southwest around 6 mph in the morning.

10% chance of snow Sunday Night Sunday Night... A slight chance of snow showers. Mostly cloudy, with a low around 13. South southwest wind 3 to 5 mph.

Partly Sunny on Monday Monday... Partly sunny, with a high near 33. West wind 3 to 7 mph.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 16. Light west wind.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 34. Calm wind becoming southwest around 6 mph in the morning.

Current Radar Image


Sun Almanac for Frankfort, Illinois
Sunrise: 07:04 AM
Sunset: 5:13 PM
Civil Sunrise:06:36 AM
Civil Sunset: 5:41 PM
Nautical Sunrise: 06:04 AM
Nautical Sunset: 6:13 PM
Astro Sunrise: 05:33 AM
Astro Sunset: 6:44 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.