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.
Tonight
52°F
Slight Chance Rain Showers then Partly Cloudy
A slight chance of rain showers before 10pm. Partly cloudy, with a low around 52. North northwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for San Simeon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 10 mph NNW | 15% |
| Wednesday | 69°F | Mostly Sunny | 5 to 10 mph N | 0% |
| Wednesday Night | 54°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph N | 0% |
| Thursday | 73°F | Patchy Fog then Mostly Sunny | 5 to 10 mph N | 0% |
| Thursday Night | 52°F | Mostly Clear | 5 mph N | 0% |
| Friday | 75°F | Sunny | 5 to 10 mph NNE | 0% |
| Friday Night | 56°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 76°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 57°F | Mostly Clear | 0 to 5 mph N | 0% |
| Sunday | 76°F | Sunny | 0 to 5 mph NNE | 0% |
| Sunday Night | 59°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Monday | 74°F | Partly Sunny | 0 to 5 mph NNW | 0% |
| Monday Night | 57°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 73°F | Mostly Sunny | 0 to 5 mph N | 2% |
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
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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.