San Martin, CA Weather & Growing Conditions
Tonight
46°F
Partly Cloudy then Patchy Fog
Patchy fog between midnight and 3am. Partly cloudy. Low around 46, with temperatures rising to around 48 overnight. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Partly Cloudy then Patchy Fog | 5 mph NE | 2% |
| Wednesday | 71°F | Sunny | 3 to 13 mph NNW | 1% |
| Wednesday Night | 46°F | Mostly Cloudy | 3 to 15 mph NNW | 1% |
| Thursday | 75°F | Mostly Sunny | 6 mph NW | 0% |
| Thursday Night | 44°F | Mostly Clear | 6 mph N | 0% |
| Friday | 79°F | Sunny | 0 to 5 mph N | 0% |
| Friday Night | 46°F | Mostly Clear | 0 to 3 mph NNE | 0% |
| Saturday | 82°F | Sunny | 0 to 5 mph ESE | 0% |
| Saturday Night | 48°F | Mostly Clear | 0 to 6 mph N | 0% |
| Sunday | 82°F | Sunny | 0 to 5 mph N | 0% |
| Sunday Night | 50°F | Partly Cloudy | 0 to 6 mph N | 0% |
| Monday | 78°F | Mostly Sunny | 1 to 5 mph NW | 0% |
| Monday Night | 49°F | Partly Cloudy | 3 to 7 mph NW | 1% |
| Tuesday | 78°F | Sunny | 0 to 3 mph NW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Martin, CA
Last spring frost
Feb 24
First fall frost
Nov 27
Growing season
277 days
Hardiness zone
9b
Explore more for San Martin, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Gilroy, Ca (7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.