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

35°F

2°C

Humidity 62%
Wind Speed NE 3 mph
Barometer 30.13 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 14 Mar 3:15 am CDT
Extended Forecast for

Chillicothe IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of snow between 7am and 9am. Mostly cloudy, with a high near 49. Light east wind becoming east southeast 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    High: 49 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42. East southeast wind 10 to 13 mph, with gusts as high as 24 mph.

    Low: 42 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain, mainly after 10am. High near 65. Breezy, with a south wind 15 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 65 °F

    Breezy. Rain
    Likely then
    Rain

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow. Patchy blowing snow after midnight. Low around 18. Blustery, with a south southwest wind 18 to 24 mph becoming north northwest after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 18 °F

    Rain/Snow and
    Blustery then
    Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely before 1pm. Areas of blowing snow. Cloudy, with a high near 25. Blustery, with a west northwest wind around 24 mph, with gusts as high as 39 mph. Chance of precipitation is 60%.

    High: 25 °F

    Snow Likely
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 8. West northwest wind 10 to 18 mph, with gusts as high as 30 mph.

    Low: 8 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.

    Low: 21 °F

    Snow Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 31. Calm wind.
Saturday
A slight chance of snow between 7am and 9am. Mostly cloudy, with a high near 49. Light east wind becoming east southeast 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 42. East southeast wind 10 to 13 mph, with gusts as high as 24 mph.
Sunday
Rain, mainly after 10am. High near 65. Breezy, with a south wind 15 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain before 10pm, then snow. Patchy blowing snow after midnight. Low around 18. Blustery, with a south southwest wind 18 to 24 mph becoming north northwest after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Monday
Snow likely before 1pm. Areas of blowing snow. Cloudy, with a high near 25. Blustery, with a west northwest wind around 24 mph, with gusts as high as 39 mph. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 8. West northwest wind 10 to 18 mph, with gusts as high as 30 mph.
Tuesday
Mostly sunny, with a high near 27.
Tuesday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 51.
Wednesday Night
Mostly clear, with a low around 33.
Thursday
Partly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 40.
Friday
Mostly sunny, with a high near 62.
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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:
2:57 am CDT Mar 14, 2026
Forecast Valid:
3am CDT Mar 14, 2026-6pm CDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation