San Simeon, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for San Simeon, a community in San Luis Obispo County, California.

Overnight

52°F

Slight Chance Light Rain

A slight chance of rain before 4am. Partly cloudy, with a low around 52. North northeast wind around 5 mph. Chance of precipitation is 20%.

7-day forecast for San Simeon

When	Temp	Forecast	Wind	Precip
Overnight	52°F	Slight Chance Light Rain	5 mph NNE	15%
Wednesday	69°F	Mostly Sunny	5 to 10 mph N	1%
Wednesday Night	53°F	Mostly Cloudy then Patchy Fog	5 to 10 mph N	1%
Thursday	73°F	Patchy Fog then Mostly Sunny	5 to 10 mph N	0%
Thursday Night	53°F	Mostly Clear	5 to 10 mph N	0%
Friday	76°F	Sunny	5 to 10 mph N	0%
Friday Night	55°F	Mostly Clear	0 to 5 mph N	0%
Saturday	77°F	Sunny	0 to 5 mph NNW	0%
Saturday Night	57°F	Mostly Clear	0 to 5 mph N	0%
Sunday	76°F	Sunny	0 to 5 mph N	0%
Sunday Night	59°F	Partly Cloudy	0 to 5 mph N	0%
Monday	75°F	Mostly Sunny	0 to 5 mph N	0%
Monday Night	58°F	Partly Cloudy	0 to 5 mph NNW	1%
Tuesday	73°F	Sunny	0 to 5 mph NNW	3%

Forecast source: National Weather Service (api.weather.gov) for San Simeon (35.618, -121.137). Updated through the day.

Growing snapshot for San Simeon

Last spring frost

Feb 13

First fall frost

Feb 1

Growing season

365 days

Hardiness zone

10a

More local growing data for San Simeon: nearby ZIP 93428 weather · frost dates · planting calendar · California frost dates

Nearby towns & communities

Arroyo Grande Atascadero Avila Beach Blacklake California Polytechnic State University Callender Cambria Cayucos Creston Edna El Paso de Robles (Paso Robles) Garden Farms Grover Beach Los Berros Los Osos Los Ranchos Morro Bay Nipomo Oceano Pismo Beach San Luis Obispo San Miguel Santa Margarita Shandon Templeton Whitley Gardens Woodlands

All California locations ›

Climate data from the nearest NOAA station, Hearst Castle, Ca (9.9 mi from San Simeon). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.