San Jose, CA Weather & Growing Conditions
Tonight
56°F
Mostly Clear then Areas Of Fog
Areas of fog after 4am. Mostly clear, with a low around 56. West southwest wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Mostly Clear then Areas Of Fog | 1 to 5 mph WSW | 0% |
| Saturday | 85°F | Areas Of Fog then Mostly Sunny | 0 to 9 mph NW | 0% |
| Saturday Night | 57°F | Mostly Cloudy | 1 to 8 mph NW | 0% |
| Sunday | 79°F | Patchy Fog then Partly Sunny | 1 to 8 mph WNW | 2% |
| Sunday Night | 56°F | Mostly Cloudy then Patchy Fog | 1 to 8 mph W | 2% |
| Monday | 82°F | Patchy Fog then Mostly Sunny | 1 to 8 mph WSW | 0% |
| Monday Night | 57°F | Mostly Clear | 1 to 8 mph WSW | 0% |
| Tuesday | 85°F | Sunny | 1 to 8 mph SW | 0% |
| Tuesday Night | 59°F | Mostly Clear | 0 to 8 mph WNW | 0% |
| Wednesday | 93°F | Sunny | 0 to 8 mph NW | 0% |
| Wednesday Night | 64°F | Mostly Clear | 0 to 8 mph NNW | 0% |
| Thursday | 94°F | Sunny | 0 to 9 mph NW | 0% |
| Thursday Night | 63°F | Mostly Clear | 1 to 9 mph WNW | 0% |
| Friday | 88°F | Sunny | 1 to 10 mph WNW | 0% |
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 Sep 19, 2026.