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

58°F

14°C

Humidity 49%
Wind Speed Calm
Barometer 29.89 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 9 May 11:35 pm CDT
Extended Forecast for

Chillicothe IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 46. North wind 3 to 6 mph.

    Low: 46 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 66. Calm wind becoming north northwest 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42. North northwest wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. North wind 5 to 7 mph becoming south southeast after midnight.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 76. Breezy, with a southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 76 °F

    Mostly Sunny
    then Chance
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 52. Southwest wind 6 to 14 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 46. North wind 3 to 6 mph.
Sunday
Sunny, with a high near 66. Calm wind becoming north northwest 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Sunday Night
Mostly clear, with a low around 42. North northwest wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 68. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 44. North wind 5 to 7 mph becoming south southeast after midnight.
Tuesday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 76. Breezy, with a southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 52. Southwest wind 6 to 14 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.
Wednesday
Sunny, with a high near 68.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 71.
Thursday Night
A chance of showers. Partly cloudy, with a low around 52.
Friday
A chance of showers. Mostly sunny, with a high near 79.
Friday Night
A chance of showers. Partly cloudy, with a low around 58.
Saturday
Mostly sunny, with a high near 86.
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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:
11:46 pm CDT May 9, 2026
Forecast Valid:
11pm CDT May 9, 2026-6pm CDT May 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation