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

53°F

12°C

Humidity 72%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 19 Mar 8:35 pm CDT
Extended Forecast for

Chillicothe IL

  • Tonight

    Tonight: Partly cloudy, with a low around 44. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 70. Southwest wind 6 to 8 mph becoming north northwest in the afternoon. Winds could gust as high as 15 mph.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43. North wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 71. South southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 71 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34. North wind 10 to 15 mph, with gusts as high as 24 mph.

    Low: 34 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 44. Calm wind becoming south southwest around 5 mph after midnight.
Friday
Mostly sunny, with a high near 70. Southwest wind 6 to 8 mph becoming north northwest in the afternoon. Winds could gust as high as 15 mph.
Friday Night
Mostly cloudy, with a low around 43. North wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 74. Calm wind becoming south southwest 5 to 7 mph in the morning.
Saturday Night
Mostly clear, with a low around 56. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 71. South southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 34. North wind 10 to 15 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 51.
Monday Night
Mostly cloudy, with a low around 36.
Tuesday
Mostly cloudy, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
A chance of rain. Partly sunny, with a high near 67.
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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:
7:46 pm CDT Mar 19, 2026
Forecast Valid:
8pm CDT Mar 19, 2026-6pm CDT Mar 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation