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Frankfort, Illinois Weather Forecast
Frankfort, Illinois Weather
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Weather Forecast for Frankfort, Illinois : Franklin County
Issued: 10:31 am CST Dec 28, 2025 Latitude: 37.9000495 Longitude: -88.9022902 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday New Year's Day Friday Saturday
80% chance of thunderstorms on Today 50% chance of rain on Tonight Mostly Sunny on Monday Sunny on Tuesday Partly Sunny on Wednesday Mostly Sunny on New Year's Day Partly Sunny on Friday Mostly Cloudy on Saturday
High: 70°F Low: 20°F High: 30°F High: 34°F High: 44°F High: 44°F High: 44°F High: 52°F
Low: 18°F Low: 26°F Low: 27°F Low: 24°F Low: 34°F  
Thunderstorms Rain Mostly Sunny Sunny Partly Sunny Mostly Sunny Partly Sunny Mostly Cloudy
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Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
68°
Cloudy
as of 10:35 AM CST
Rel. Humidity: 77%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 29.73 in.
Flight Rule: MVFR
Wind Data
20 MPH
Gust: 28 MPH
210° Southwest
Cloud Level(s): Solid Overcast at 1500ft
80% chance of thunderstorms Today Today... A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. High near 70. Breezy, with a south southwest wind 20 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.

50% chance of rain Tonight Tonight... A 50 percent chance of showers, mainly before 8pm. Cloudy during the early evening, then gradual clearing, with a low around 20. Blustery, with a west northwest wind 20 to 24 mph, with gusts as high as 39 mph.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 30. Blustery, with a west northwest wind 15 to 21 mph, with gusts as high as 33 mph.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 18. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 34. Northwest wind 5 to 8 mph becoming west southwest in the afternoon.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 26. Southwest wind 3 to 6 mph.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 44. West wind 5 to 9 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 27. West wind 3 to 6 mph.

Mostly Sunny on New Year's Day New Year's Day... Mostly sunny, with a high near 44. Northwest wind 5 to 8 mph.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 24. Light north wind.

Partly Sunny on Friday Friday... Partly sunny, with a high near 44. Calm wind becoming south southwest 5 to 7 mph in the morning.

10% chance of rain Friday Night Friday Night... A slight chance of showers. Mostly cloudy, with a low around 34. South wind 3 to 5 mph.

Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 52. South wind 5 to 8 mph.

Sun Almanac for Frankfort, Illinois
Sunrise: 07:11 AM
Sunset: 4:44 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:14 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 5:46 PM
Astro Sunrise: 05:36 AM
Astro Sunset: 6:18 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.