Chillicothe, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Chillicothe, IL in one place.
Mostly sunny, with a high near 81.
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: Apr 20, 2026 5:28 AM CDT.
The active forecast window currently covers Apr 23 to Apr 26, 2026 for Chillicothe, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 23 to Apr 26, 2026
- Latest sync
- Apr 20, 2026 5:28 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chillicothe
Thursday looks like the warmest upcoming period in Chillicothe at 81 degrees F.
Saturday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Thursday at about 6 to 18 mph S.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 20, 2026 5:28 AM CDT
- Coverage
- 4 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
A chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 80%.
Showers and thunderstorms. Mostly cloudy, with a high near 72.
A chance of rain showers. Mostly cloudy, with a low around 48.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 68.
A slight chance of rain showers after 7pm. Partly cloudy, with a low around 46.
A slight chance of rain showers. Mostly sunny, with a high near 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 23
|
Mostly Sunny
|
81°F |
6 to 18 mph
S
|
|
Thursday Night
Apr 23
|
Chance Showers And Thunderstorms
|
61°F |
13 to 16 mph
S
|
|
Friday
Apr 24
|
Showers And Thunderstorms
|
72°F |
13 mph
WSW
|
|
Friday Night
Apr 24
|
Chance Rain Showers
|
48°F |
6 to 9 mph
NW
|
|
Saturday
Apr 25
|
Slight Chance Rain Showers then Mostly Sunny
|
68°F |
9 mph
N
|
|
Saturday Night
Apr 25
|
Slight Chance Rain Showers
|
46°F |
5 to 8 mph
NNE
|
|
Sunday
Apr 26
|
Slight Chance Rain Showers
|
67°F |
6 to 9 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chillicothe.