Clayton, MO Weather & Growing Conditions
Today
59°F
Patchy Drizzle then Mostly Cloudy
Patchy drizzle before noon. Mostly cloudy, with a high near 59. West wind 7 to 13 mph, with gusts as high as 22 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Patchy Drizzle then Mostly Cloudy | 7 to 13 mph W | 12% |
| Tonight | 47°F | Partly Cloudy | 6 mph W | 0% |
| Thursday | 64°F | Sunny | 6 to 9 mph W | 0% |
| Thursday Night | 49°F | Mostly Cloudy | 6 mph NW | 3% |
| Friday | 57°F | Partly Sunny | 6 to 9 mph N | 1% |
| Friday Night | 39°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 3 mph N | 0% |
| Saturday Night | 37°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 61°F | Sunny | 5 mph NW | 1% |
| Sunday Night | 39°F | Clear | 2 mph W | 0% |
| Monday | 66°F | Sunny | 3 mph SW | 0% |
| Monday Night | 44°F | Clear | 3 mph SW | 0% |
| Tuesday | 68°F | Sunny | 3 mph W | 1% |
| Tuesday Night | 46°F | Mostly Clear | 1 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Clayton, MO
Last spring frost
Apr 1
First fall frost
Nov 4
Growing season
218 days
Hardiness zone
7a
Explore more for Clayton, MO: full frost dates · planting calendar · Missouri frost dates
Climate data from the nearest NOAA station, St Louis Sci Ctr, Mo (3.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.