Clayton, IL Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Clayton, IL in one place.
Mostly sunny, with a high near 77. Southwest wind around 12 mph, with gusts as high as 23 mph.
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: Apr 21, 2026 12:10 PM CDT.
The active forecast window currently covers Apr 22 to Apr 27, 2026 for Clayton, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 27, 2026
- Latest sync
- Apr 21, 2026 12:10 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clayton
Thursday looks like the warmest upcoming period in Clayton at 81 degrees F.
Saturday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Thursday at about 9 to 20 mph S.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 21, 2026 12:10 PM 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
Mostly clear, with a low around 59. South wind around 9 mph.
A slight chance of rain showers between 1pm and 4pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. South wind 9 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms before 1am, then showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 80%.
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 73. Chance of precipitation is 80%.
A chance of showers and thunderstorms. Partly cloudy, with a low around 51. Chance of precipitation is 40%.
A slight chance of rain showers. Mostly sunny, with a high near 71. Chance of precipitation is 20%.
A slight chance of rain showers. Partly cloudy, with a low around 49. Chance of precipitation is 20%.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Mostly Sunny
|
77°F |
12 mph
SW
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
59°F |
9 mph
S
|
|
Thursday
Apr 23
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
81°F |
9 to 20 mph
S
|
|
Thursday Night
Apr 23
|
Chance Showers And Thunderstorms
|
59°F |
13 to 17 mph
S
|
|
Friday
Apr 24
|
Showers And Thunderstorms
|
73°F |
12 mph
W
|
|
Friday Night
Apr 24
|
Chance Showers And Thunderstorms
|
51°F |
10 mph
N
|
|
Saturday
Apr 25
|
Slight Chance Rain Showers
|
71°F |
10 mph
NE
|
|
Saturday Night
Apr 25
|
Slight Chance Rain Showers
|
49°F |
9 mph
NE
|
|
Sunday
Apr 26
|
Chance Showers And Thunderstorms
|
70°F |
12 mph
E
|
|
Sunday Night
Apr 26
|
Showers And Thunderstorms Likely
|
54°F |
10 mph
E
|
|
Monday
Apr 27
|
Showers And Thunderstorms Likely
|
70°F |
14 mph
SE
|
|
Monday Night
Apr 27
|
Chance Showers And Thunderstorms
|
50°F |
13 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Clayton.