Chillicothe, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Chillicothe, IL in one place.
Sunny, with a high near 85. East wind 0 to 6 mph.
Local Weather Overview
This forecast page for Chillicothe, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 24, 2026 11:42 AM CDT.
The active forecast window currently covers May 25 to May 30, 2026 for Chillicothe, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 25 to May 30, 2026
- Latest sync
- May 24, 2026 11:42 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chillicothe
Memorial Day looks like the warmest upcoming period in Chillicothe at 85 degrees F.
Friday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Friday at about 6 to 10 mph ENE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 11:42 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 59. Southeast wind 0 to 5 mph.
Mostly sunny, with a high near 85. East southeast wind 1 to 6 mph.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. East southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Partly sunny, with a high near 84. East wind 0 to 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 62. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84.
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
A slight chance of rain showers. Partly sunny, with a high near 79.
A slight chance of rain showers. Partly cloudy, with a low around 56.
A slight chance of rain showers. Mostly sunny, with a high near 77.
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Memorial Day
May 25
|
Sunny
|
85°F |
0 to 6 mph
E
|
|
Monday Night
May 25
|
Mostly Clear
|
59°F |
0 to 5 mph
SE
|
|
Tuesday
May 26
|
Mostly Sunny
|
85°F |
1 to 6 mph
ESE
|
|
Tuesday Night
May 26
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
64°F |
0 to 5 mph
ESE
|
|
Wednesday
May 27
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
84°F |
0 to 6 mph
E
|
|
Wednesday Night
May 27
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
62°F |
5 mph
ENE
|
|
Thursday
May 28
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
84°F |
3 to 8 mph
ENE
|
|
Thursday Night
May 28
|
Slight Chance Showers And Thunderstorms
|
59°F |
8 mph
ENE
|
|
Friday
May 29
|
Slight Chance Rain Showers
|
79°F |
6 to 10 mph
ENE
|
|
Friday Night
May 29
|
Slight Chance Rain Showers
|
56°F |
5 to 9 mph
ENE
|
|
Saturday
May 30
|
Slight Chance Rain Showers
|
77°F |
5 to 10 mph
ENE
|
|
Saturday Night
May 30
|
Slight Chance Rain Showers then Partly Cloudy
|
56°F |
3 to 8 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chillicothe.