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

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Fair

57°F

14°C

Humidity 88%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 30 Jul 6:35 am CDT
Extended Forecast for

Chillicothe IL

  • Today

    Today: Sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 65. Southeast wind 3 to 5 mph.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Increasing clouds, with a high near 76. South southeast wind 5 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 76 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 65. Southeast wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 65 °F

    Showers

  • Saturday

    Saturday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 78. North northeast wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64. North northeast wind 6 to 13 mph, with gusts as high as 21 mph.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 81. North northeast wind around 9 mph, with gusts as high as 17 mph.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 84. Light and variable wind.
Tonight
Partly cloudy, with a low around 65. Southeast wind 3 to 5 mph.
Friday
A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Increasing clouds, with a high near 76. South southeast wind 5 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
Showers and possibly a thunderstorm. Low around 65. Southeast wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Saturday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 78. North northeast wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Partly cloudy, with a low around 64. North northeast wind 6 to 13 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 81. North northeast wind around 9 mph, with gusts as high as 17 mph.
Sunday Night
Clear, with a low around 62.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chillicothe IL
 40.91°N 89.49°W (Elev. 472 ft)
Last Update:
6:36 am CDT Jul 30, 2026
Forecast Valid:
6am CDT Jul 30, 2026-6pm CDT Aug 5, 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