Clayton, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms then Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Clayton, IL in one place.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely between 7am and 8am, then patchy fog and showers and thunderstorms between 8am and 10am, then patchy fog and showers and thunderstorms between 10am and 4pm, then a chance of showers and thunderstorms. Cloudy, with a high near 73. Southeast wind 6 to 10 mph. Chance of precipitation is 100%.
Local Weather Overview
This forecast page for Clayton, 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: Oct 14, 2026 4:47 AM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Clayton, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 4:47 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clayton
Tuesday looks like the warmest upcoming period in Clayton at 75 degrees F.
Friday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Friday at about 17 to 22 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 4:47 AM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- 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 7pm, then showers and thunderstorms likely between 7pm and 1am. Mostly cloudy, with a low around 46. West wind 9 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 60%.
Mostly sunny, with a high near 57.
Mostly clear, with a low around 37.
Sunny, with a high near 61.
Clear, with a low around 40.
Sunny, with a high near 68.
Partly cloudy, with a low around 47.
Partly sunny, with a high near 70.
Partly cloudy, with a low around 50.
Sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Chance Showers And Thunderstorms then Patchy Fog
|
73°F |
6 to 10 mph
SE
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
46°F |
9 to 17 mph
W
|
|
Friday
Oct 16
|
Mostly Sunny
|
57°F |
17 to 22 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
37°F |
1 to 14 mph
N
|
|
Saturday
Oct 17
|
Sunny
|
61°F |
0 to 3 mph
S
|
|
Saturday Night
Oct 17
|
Clear
|
40°F |
3 to 7 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
68°F |
7 to 10 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
47°F |
8 mph
S
|
|
Monday
Oct 19
|
Partly Sunny
|
70°F |
6 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
50°F |
3 mph
S
|
|
Tuesday
Oct 20
|
Sunny
|
75°F |
2 to 6 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Clayton.