Weather forecast for: Chillicothe IL
Last Update: 9:31 am CDT Sep 13, 2026
Today: Scattered showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 74. North wind 5 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 40%.
Tonight: Isolated showers and thunderstorms before 7pm. Partly cloudy, with a low around 56. North wind 3 to 5 mph. Chance of precipitation is 10%.
Monday: Mostly sunny, with a high near 77. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Monday Night: Mostly clear, with a low around 71. South southeast wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday: Showers likely, with thunderstorms also possible after 4pm. Partly sunny, with a high near 87. South southwest wind 8 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: Showers and possibly a thunderstorm. Low around 64. North northeast wind 3 to 6 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Wednesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 79. Northeast wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Thursday: Showers likely before 1pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Thursday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 66.
Friday: A chance of showers. Mostly sunny, with a high near 80.
Friday Night: A chance of showers. Partly cloudy, with a low around 62.
Saturday: A chance of showers. Partly sunny, with a high near 77.