National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Lewis University Airport (KLOT)

Lat: 41.6°NLon: 88.1°WElev: 669ft.

Overcast

59°F

15°C

Humidity 72%
Wind Speed N 13 G 20 mph
Barometer 30.13 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 20 May 1:35 am CDT
Extended Forecast for

Frankfort IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 53. North wind around 10 mph, with gusts as high as 15 mph.

    Low: 53 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 60. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 60 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 48. East wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Cloudy, with a low around 54. Chance of precipitation is 70%.

    Low: 54 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly cloudy, with a high near 73.

    High: 73 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 53. North wind around 10 mph, with gusts as high as 15 mph.
Wednesday
Partly sunny, with a high near 60. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 45. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 64. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 48. East wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Cloudy, with a low around 54. Chance of precipitation is 70%.
Saturday
Mostly cloudy, with a high near 73.
Saturday Night
Mostly cloudy, with a low around 55.
Sunday
Mostly cloudy, with a high near 76.
Sunday Night
Mostly cloudy, with a low around 56.
Memorial Day
Partly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Frankfort IL
 41.49°N 87.85°W
Last Update:
1:30 am CDT May 20, 2026
Forecast Valid:
1am CDT May 20, 2026-6pm CDT May 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation