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. West southwest wind 5 to 12 mph, with gusts as high as 18 mph. New rainfall amounts less than a tenth of an inch possible.
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: Aug 25, 2026 7:43 PM CDT.
The active forecast window currently covers Aug 26 to Aug 31, 2026 for Chillicothe, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 26 to Aug 31, 2026
- Latest sync
- Aug 25, 2026 7:43 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chillicothe
Sunday looks like the warmest upcoming period in Chillicothe at 87 degrees F.
Thursday Night is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Sunday at about 9 to 13 mph S.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 25, 2026 7:43 PM 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 63. Northwest wind 3 to 8 mph. New rainfall amounts less than a tenth of an inch possible.
Sunny, with a high near 83. North northwest wind 1 to 6 mph.
Mostly clear, with a low around 60. North wind 0 to 3 mph.
Sunny, with a high near 83. North northeast wind around 1 mph.
Mostly clear, with a low around 60.
Mostly sunny, with a high near 83.
Partly cloudy, with a low around 66.
Mostly sunny, with a high near 87.
Partly cloudy, with a low around 70.
A slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 87.
A slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Aug 26
|
Sunny
|
85°F |
5 to 12 mph
WSW
|
|
Wednesday Night
Aug 26
|
Mostly Clear
|
63°F |
3 to 8 mph
NW
|
|
Thursday
Aug 27
|
Sunny
|
83°F |
1 to 6 mph
NNW
|
|
Thursday Night
Aug 27
|
Mostly Clear
|
60°F |
0 to 3 mph
N
|
|
Friday
Aug 28
|
Sunny
|
83°F |
1 mph
NNE
|
|
Friday Night
Aug 28
|
Mostly Clear
|
60°F |
1 mph
ESE
|
|
Saturday
Aug 29
|
Mostly Sunny
|
83°F |
1 to 6 mph
SSE
|
|
Saturday Night
Aug 29
|
Partly Cloudy
|
66°F |
3 to 10 mph
SSE
|
|
Sunday
Aug 30
|
Mostly Sunny
|
87°F |
9 to 13 mph
S
|
|
Sunday Night
Aug 30
|
Partly Cloudy
|
70°F |
10 mph
S
|
|
Monday
Aug 31
|
Slight Chance Showers And Thunderstorms
|
87°F |
8 mph
SW
|
|
Monday Night
Aug 31
|
Slight Chance Showers And Thunderstorms
|
69°F |
5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chillicothe.