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

28°F

-2°C

Humidity 71%
Wind Speed SW 8 mph
Barometer 30.24 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 12 Jan 3:15 am CST
Extended Forecast for

Chillicothe IL

  • Overnight

    Overnight: Partly cloudy, with a low around 24. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 44. Southwest wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 44 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 51. West southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 51 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32. West wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of snow showers after noon. Mostly cloudy, with a high near 37. Breezy, with a north wind 13 to 21 mph, with gusts as high as 33 mph.

    High: 37 °F

    Mostly Cloudy
    then Chance
    Snow Showers
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15. Blustery, with a north wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 31 mph.

    Low: 15 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of snow showers. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 24. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 44. Southwest wind 6 to 10 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 33. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 51. West southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 32. West wind 10 to 13 mph, with gusts as high as 23 mph.
Wednesday
A 30 percent chance of snow showers after noon. Mostly cloudy, with a high near 37. Breezy, with a north wind 13 to 21 mph, with gusts as high as 33 mph.
Wednesday Night
Partly cloudy, with a low around 15. Blustery, with a north wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 31 mph.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
A 40 percent chance of snow showers. Mostly cloudy, with a low around 24.
Friday
Snow showers likely after noon. Mostly cloudy, with a high near 37. Chance of precipitation is 60%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 16.
Saturday
Partly sunny, with a high near 23.
Saturday Night
Mostly cloudy, with a low around 6.
Sunday
Partly sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chillicothe IL
 40.94°N 89.51°W (Elev. 499 ft)
Last Update:
3:24 am CST Jan 12, 2026
Forecast Valid:
3am CST Jan 12, 2026-6pm CST Jan 18, 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