San Jose, CA Weather & Growing Conditions
Overnight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. East wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Partly Cloudy | 2 mph E | 0% |
| Wednesday | 68°F | Patchy Fog then Sunny | 2 to 10 mph NW | 1% |
| Wednesday Night | 48°F | Mostly Cloudy then Patchy Fog | 1 to 8 mph ESE | 1% |
| Thursday | 73°F | Patchy Fog then Mostly Sunny | 1 to 7 mph N | 0% |
| Thursday Night | 47°F | Clear | 2 to 6 mph NNE | 0% |
| Friday | 75°F | Sunny | 1 to 6 mph NNW | 0% |
| Friday Night | 50°F | Mostly Clear | 1 to 6 mph N | 0% |
| Saturday | 78°F | Sunny | 0 to 3 mph NNE | 0% |
| Saturday Night | 50°F | Mostly Clear | 0 to 3 mph N | 0% |
| Sunday | 77°F | Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Monday | 74°F | Mostly Sunny | 0 to 7 mph NNW | 1% |
| Monday Night | 50°F | Partly Cloudy | 1 to 7 mph N | 1% |
| Tuesday | 74°F | Sunny | 0 to 5 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Jose, CA
Last spring frost
Jan 2
First fall frost
Dec 25
Growing season
362 days
Hardiness zone
9b
Explore more for San Jose, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, San Jose, Ca (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.