San Miguel, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Miguel, a community in San Luis Obispo County, California.
Tonight
54°F
Patchy Fog
Patchy fog after 11pm. Mostly cloudy, with a low around 54. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
7-day forecast for San Miguel
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Patchy Fog | 5 to 15 mph NW | 0% |
| Sunday | 89°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph WNW | 1% |
| Sunday Night | 53°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph WNW | 5% |
| Monday | 86°F | Patchy Fog then Mostly Sunny | 5 to 10 mph WSW | 1% |
| Monday Night | 52°F | Partly Cloudy | 0 to 10 mph WSW | 0% |
| Tuesday | 89°F | Mostly Sunny | 0 to 10 mph W | 0% |
| Tuesday Night | 55°F | Clear | 0 to 5 mph NW | 0% |
| Wednesday | 98°F | Sunny | 0 mph | 0% |
| Wednesday Night | 59°F | Mostly Clear | 0 mph | 0% |
| Thursday | 99°F | Sunny | 0 to 10 mph S | 0% |
| Thursday Night | 57°F | Mostly Clear | 0 to 10 mph S | 1% |
| Friday | 91°F | Sunny | 0 to 10 mph SSW | 1% |
| Friday Night | 54°F | Mostly Clear | 0 to 10 mph W | 1% |
| Saturday | 87°F | Sunny | 0 to 10 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov) for San Miguel (35.753, -120.692). Updated through the day.
Growing snapshot for San Miguel
Last spring frost
Mar 15
First fall frost
Nov 10
Growing season
238 days
Hardiness zone
9a
More local growing data for San Miguel: nearby ZIP 93446 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Paso Robles, Ca (2.8 mi from San Miguel). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.