Clayton, IL Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Clayton, IL in one place.
Patchy fog after 5am. Clear, with a low around 60. Southeast wind around 1 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: Aug 3, 2026 3:34 AM CDT.
The active forecast window currently covers Aug 3 to Aug 9, 2026 for Clayton, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 3 to Aug 9, 2026
- Latest sync
- Aug 3, 2026 3:34 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clayton
Sunday looks like the warmest upcoming period in Clayton at 89 degrees F.
Overnight is the coolest period ahead with temperatures near 60 degrees F.
The strongest winds are forecast for Sunday at about 6 to 9 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 3, 2026 3:34 AM CDT
- Coverage
- 7 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
Patchy fog before 8am. Sunny, with a high near 83. East wind around 3 mph.
Mostly clear, with a low around 63. Southeast wind around 5 mph.
Mostly sunny, with a high near 87. South wind around 6 mph.
Partly cloudy, with a low around 68. Southeast wind around 6 mph.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1am, then showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 80%.
Showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 80%.
A slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 65. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Mostly sunny, with a high near 86.
Mostly clear, with a low around 69.
Sunny, with a high near 89.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Aug 3
|
Patchy Fog
|
60°F |
1 mph
SE
|
|
Monday
Aug 3
|
Patchy Fog then Sunny
|
83°F |
3 mph
E
|
|
Monday Night
Aug 3
|
Mostly Clear
|
63°F |
5 mph
SE
|
|
Tuesday
Aug 4
|
Mostly Sunny
|
87°F |
6 mph
S
|
|
Tuesday Night
Aug 4
|
Partly Cloudy
|
68°F |
6 mph
SE
|
|
Wednesday
Aug 5
|
Mostly Sunny then Chance Showers And Thunderstorms
|
85°F |
5 mph
S
|
|
Wednesday Night
Aug 5
|
Chance Showers And Thunderstorms
|
66°F |
6 mph
E
|
|
Thursday
Aug 6
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
81°F |
5 mph
NW
|
|
Thursday Night
Aug 6
|
Slight Chance Showers And Thunderstorms
|
65°F |
1 to 5 mph
NE
|
|
Friday
Aug 7
|
Slight Chance Showers And Thunderstorms
|
83°F |
3 mph
SE
|
|
Friday Night
Aug 7
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
66°F |
3 mph
SE
|
|
Saturday
Aug 8
|
Mostly Sunny
|
86°F |
2 to 6 mph
S
|
|
Saturday Night
Aug 8
|
Mostly Clear
|
69°F |
6 mph
S
|
|
Sunday
Aug 9
|
Sunny
|
89°F |
6 to 9 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Clayton.