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.

Overcast

56°F

13°C

Humidity 55%
Wind Speed NE 7 mph
Barometer 30.12 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 22 May 12:55 am CDT
Extended Forecast for

Chillicothe IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 52. East northeast wind around 7 mph, with gusts as high as 17 mph.

    Low: 52 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 3pm. Mostly cloudy, with a high near 71. East northeast wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 71 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers, mainly between 9pm and 1am. Mostly cloudy, with a low around 55. East wind 5 to 9 mph becoming light east northeast after midnight. Winds could gust as high as 16 mph.

    Low: 55 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 77. Calm wind becoming north northwest around 5 mph.

    High: 77 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 79. Light and variable wind.

    High: 79 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 52. East northeast wind around 7 mph, with gusts as high as 17 mph.
Friday
A 20 percent chance of showers after 3pm. Mostly cloudy, with a high near 71. East northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Friday Night
A 40 percent chance of showers, mainly between 9pm and 1am. Mostly cloudy, with a low around 55. East wind 5 to 9 mph becoming light east northeast after midnight. Winds could gust as high as 16 mph.
Saturday
Mostly cloudy, with a high near 77. Calm wind becoming north northwest around 5 mph.
Saturday Night
Mostly cloudy, with a low around 57. Calm wind.
Sunday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 79. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 56. Calm wind.
Memorial Day
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 84.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chillicothe IL
 40.92°N 89.52°W (Elev. 522 ft)
Last Update:
9:36 pm CDT May 21, 2026
Forecast Valid:
1am CDT May 22, 2026-6pm CDT May 28, 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