Clayton, MO Weather Forecast
Local 7-day forecast
Mostly Clear
Track current conditions, temperature changes, wind, and the full daily outlook for Clayton, MO in one place.
Mostly clear, with a low around 77. South wind around 3 mph.
Local Weather Overview
This forecast page for Clayton, MO 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: Sep 17, 2026 2:14 AM CDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Clayton, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 17, 2026 2:14 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Clayton
Thursday looks like the warmest upcoming period in Clayton at 99 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Saturday at about 5 to 8 mph SW.
Precipitation is mentioned in 11 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 17, 2026 2:14 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 99. Heat index values as high as 109. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 75. Heat index values as high as 103. West wind 2 to 6 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms between 1pm and 2pm. Sunny, with a high near 97. Heat index values as high as 104. Southeast wind around 5 mph. Chance of precipitation is 20%.
Mostly clear, with a low around 76. South wind around 5 mph.
Mostly sunny, with a high near 98.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
A slight chance of rain showers. Mostly sunny, with a high near 82. Chance of precipitation is 20%.
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
A slight chance of rain showers between 7am and 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Sep 17
|
Mostly Clear
|
77°F |
3 mph
S
|
|
Thursday
Sep 17
|
Sunny then Slight Chance Showers And Thunderstorms
|
99°F |
3 to 7 mph
SW
|
|
Thursday Night
Sep 17
|
Chance Showers And Thunderstorms then Mostly Clear
|
75°F |
2 to 6 mph
W
|
|
Friday
Sep 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
97°F |
5 mph
SE
|
|
Friday Night
Sep 18
|
Mostly Clear
|
76°F |
5 mph
S
|
|
Saturday
Sep 19
|
Mostly Sunny
|
98°F |
5 to 8 mph
SW
|
|
Saturday Night
Sep 19
|
Partly Cloudy then Chance Showers And Thunderstorms
|
74°F |
5 mph
SW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
93°F |
3 to 7 mph
W
|
|
Sunday Night
Sep 20
|
Slight Chance Showers And Thunderstorms
|
70°F |
6 mph
NE
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms
|
87°F |
3 to 7 mph
NW
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
66°F |
3 to 7 mph
N
|
|
Tuesday
Sep 22
|
Slight Chance Rain Showers
|
82°F |
6 mph
N
|
|
Tuesday Night
Sep 22
|
Slight Chance Rain Showers then Partly Cloudy
|
64°F |
6 mph
N
|
|
Wednesday
Sep 23
|
Slight Chance Rain Showers
|
83°F |
6 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Clayton.
