Chillicothe, IL Weather Forecast
Local 7-day forecast
Patchy Fog then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Chillicothe, IL in one place.
Patchy fog before 9am, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 86. East southeast wind 0 to 3 mph. Chance of precipitation is 20%. 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: Jul 10, 2026 8:02 AM CDT.
The active forecast window currently covers Jul 10 to Jul 16, 2026 for Chillicothe, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 10 to Jul 16, 2026
- Latest sync
- Jul 10, 2026 8:02 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chillicothe
Wednesday looks like the warmest upcoming period in Chillicothe at 91 degrees F.
Saturday Night is the coolest period ahead with temperatures near 65 degrees F.
The strongest winds are forecast for Saturday at about 3 to 7 mph NE.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 10, 2026 8:02 AM CDT
- Coverage
- 7 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 before 1am. Mostly cloudy, with a low around 66. Northeast wind around 3 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 85. Northeast wind 3 to 7 mph.
Mostly clear, with a low around 65. East northeast wind 2 to 6 mph.
Sunny, with a high near 86. East northeast wind around 5 mph.
Clear, with a low around 65. Northeast wind 0 to 3 mph.
Sunny, with a high near 88. East northeast wind 0 to 3 mph.
Clear, with a low around 67.
Sunny, with a high near 90.
Mostly clear, with a low around 70.
Sunny, with a high near 91.
Mostly clear, with a low around 70.
Sunny, with a high near 90.
Mostly clear, with a low around 71.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 10
|
Patchy Fog then Slight Chance Showers And Thunderstorms
|
86°F |
0 to 3 mph
ESE
|
|
Tonight
Jul 10
|
Chance Showers And Thunderstorms
|
66°F |
3 mph
NE
|
|
Saturday
Jul 11
|
Mostly Sunny
|
85°F |
3 to 7 mph
NE
|
|
Saturday Night
Jul 11
|
Mostly Clear
|
65°F |
2 to 6 mph
ENE
|
|
Sunday
Jul 12
|
Sunny
|
86°F |
5 mph
ENE
|
|
Sunday Night
Jul 12
|
Clear
|
65°F |
0 to 3 mph
NE
|
|
Monday
Jul 13
|
Sunny
|
88°F |
0 to 3 mph
ENE
|
|
Monday Night
Jul 13
|
Clear
|
67°F |
0 to 3 mph
NE
|
|
Tuesday
Jul 14
|
Sunny
|
90°F |
2 mph
NNE
|
|
Tuesday Night
Jul 14
|
Mostly Clear
|
70°F |
1 mph
S
|
|
Wednesday
Jul 15
|
Sunny
|
91°F |
3 mph
W
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
70°F |
3 mph
SW
|
|
Thursday
Jul 16
|
Sunny
|
90°F |
2 to 6 mph
SW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
71°F |
5 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chillicothe.