Clayton, MO Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Clayton, a city in St. Louis County, Missouri.

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 for Clayton

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) for Clayton (38.644, -90.330). Updated through the day.

Growing snapshot for Clayton

Last spring frost

Apr 1

First fall frost

Nov 4

Growing season

218 days

Hardiness zone

More local growing data for Clayton: nearby ZIP 63105 weather · frost dates · planting calendar · Missouri frost dates

Nearby towns & communities

Affton Ballwin Bel-Nor Bel-Ridge Bella Villa Bellefontaine Neighbors Bellerive Acres Berkeley Beverly Hills Black Jack Breckenridge Hills Brentwood Bridgeton Calverton Park Castle Point Champ Charlack Chesterfield Clarkson Valley Concord Cool Valley Country Club Hills Country Life Acres Crestwood Creve Coeur Crystal Lake Park Dellwood Des Peres Edmundson Ellisville

All Missouri locations ›

Climate data from the nearest NOAA station, St Louis Sci Ctr, Mo (3.2 mi from Clayton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.