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

65°F

18°C

Humidity 79%
Wind Speed Calm
Barometer 30.12 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 4 Oct 3:35 am CDT
Extended Forecast for

Chillicothe IL

  • Overnight

    Overnight: Mostly clear, with a low around 63. South southwest wind around 5 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. South southwest wind 5 to 13 mph, with gusts as high as 18 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 63. South wind around 8 mph, with gusts as high as 15 mph.

    Low: 63 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86. South wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 64. South wind 7 to 9 mph, with gusts as high as 17 mph.

    Low: 64 °F

    Clear

  • Monday

    Monday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 87. Southwest wind around 7 mph.

    High: 87 °F

    Sunny then
    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after 7pm. Mostly cloudy, with a low around 60. North wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 71.

    High: 71 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 63. South southwest wind around 5 mph.
Saturday
Sunny, with a high near 87. South southwest wind 5 to 13 mph, with gusts as high as 18 mph.
Saturday Night
Clear, with a low around 63. South wind around 8 mph, with gusts as high as 15 mph.
Sunday
Sunny, with a high near 86. South wind 8 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Clear, with a low around 64. South wind 7 to 9 mph, with gusts as high as 17 mph.
Monday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 87. Southwest wind around 7 mph.
Monday Night
Showers likely, with thunderstorms also possible after 7pm. Mostly cloudy, with a low around 60. North wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chillicothe IL
 40.91°N 89.49°W (Elev. 472 ft)
Last Update:
3:36 am CDT Oct 4, 2025
Forecast Valid:
3am CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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