San Martin, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for San Martin, a community in Santa Clara County, California.

Tonight

55°F

Partly Cloudy then Areas Of Fog

Areas of fog after 4am. Partly cloudy, with a low around 55. South southeast wind 1 to 5 mph.

7-day forecast for San Martin

When	Temp	Forecast	Wind	Precip
Tonight	55°F	Partly Cloudy then Areas Of Fog	1 to 5 mph SSE	0%
Saturday	87°F	Areas Of Fog then Mostly Sunny	0 to 7 mph SW	0%
Saturday Night	56°F	Mostly Cloudy	1 to 6 mph WNW	0%
Sunday	82°F	Mostly Cloudy	1 to 6 mph W	2%
Sunday Night	55°F	Mostly Cloudy	2 to 6 mph WSW	2%
Monday	81°F	Mostly Sunny	2 to 7 mph WSW	0%
Monday Night	55°F	Partly Cloudy then Patchy Fog	1 to 7 mph SW	0%
Tuesday	86°F	Areas Of Fog then Sunny	1 to 6 mph SW	0%
Tuesday Night	57°F	Mostly Clear	0 to 6 mph NW	0%
Wednesday	98°F	Sunny	0 to 6 mph SSW	0%
Wednesday Night	62°F	Mostly Clear	0 to 6 mph NW	0%
Thursday	98°F	Sunny	1 to 7 mph SE	0%
Thursday Night	61°F	Mostly Clear	1 to 7 mph W	0%
Friday	91°F	Sunny	1 to 8 mph W	0%

Forecast source: National Weather Service (api.weather.gov) for San Martin (37.083, -121.596). Updated through the day.

Growing snapshot for San Martin

Last spring frost

Feb 24

First fall frost

Nov 27

Growing season

277 days

Hardiness zone

More local growing data for San Martin: nearby ZIP 95046 weather · frost dates · planting calendar · California frost dates

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All California locations ›

Climate data from the nearest NOAA station, Gilroy, Ca (7 mi from San Martin). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.