San Jose, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Jose, a city in Santa Clara County, California.
Overnight
61°F
Clear
Clear, with a low around 61. South southeast wind around 3 mph.
7-day forecast for San Jose
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Clear | 3 mph SSE | 0% |
| Tuesday | 98°F | Sunny | 2 to 7 mph SW | 0% |
| Tuesday Night | 61°F | Mostly Clear | 1 to 5 mph SW | 0% |
| Wednesday | 95°F | Sunny | 1 to 6 mph WSW | 0% |
| Wednesday Night | 61°F | Clear | 0 to 6 mph W | 0% |
| Thursday | 93°F | Sunny | 0 to 7 mph NW | 0% |
| Thursday Night | 63°F | Clear | 1 to 7 mph NW | 0% |
| Friday | 97°F | Sunny | 1 to 9 mph WNW | 0% |
| Friday Night | 65°F | Clear | 0 to 9 mph WNW | 0% |
| Saturday | 97°F | Sunny | 0 to 9 mph WNW | 0% |
| Saturday Night | 65°F | Mostly Clear | 0 to 9 mph W | 0% |
| Sunday | 92°F | Sunny | 0 to 9 mph W | 0% |
| Sunday Night | 60°F | Mostly Clear | 3 to 9 mph SW | 0% |
| Monday | 87°F | Sunny | 3 to 9 mph SSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Jose (37.296, -121.815). Updated through the day.
Growing snapshot for San Jose
Last spring frost
Jan 2
First fall frost
Dec 25
Growing season
362 days
Hardiness zone
9b
More local growing data for San Jose: nearby ZIP 95121 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, San Jose, Ca (6 mi from San Jose). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.