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
47°F
Partly Cloudy then Patchy Fog
Patchy fog between midnight and 3am. Partly cloudy, with a low around 47. East wind around 5 mph.
7-day forecast for San Martin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Partly Cloudy then Patchy Fog | 5 mph E | 2% |
| Wednesday | 71°F | Sunny | 2 to 13 mph NNW | 1% |
| Wednesday Night | 47°F | Mostly Cloudy | 3 to 15 mph NNW | 1% |
| Thursday | 75°F | Mostly Sunny | 5 mph NW | 0% |
| Thursday Night | 44°F | Mostly Clear | 3 to 7 mph N | 0% |
| Friday | 79°F | Sunny | 0 to 5 mph NNE | 0% |
| Friday Night | 46°F | Mostly Clear | 5 mph N | 0% |
| Saturday | 82°F | Sunny | 0 to 5 mph NE | 0% |
| Saturday Night | 48°F | Mostly Clear | 0 to 6 mph N | 0% |
| Sunday | 82°F | Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 to 7 mph NNW | 0% |
| Monday | 79°F | Mostly Sunny | 0 to 6 mph NW | 0% |
| Monday Night | 49°F | Partly Cloudy | 3 to 8 mph NNW | 1% |
| Tuesday | 78°F | Sunny | 0 to 5 mph NNW | 5% |
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
9b
More local growing data for San Martin: nearby ZIP 95046 weather · frost dates · planting calendar · California frost dates
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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 Nov 4, 2026.