San Jose, CA Weather & Growing Conditions
This Afternoon
85°F
Sunny
Sunny. High near 85, with temperatures falling to around 82 in the afternoon. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 5 to 10 mph NW | 0% |
| Tonight | 55°F | Partly Cloudy | 2 to 9 mph NW | 0% |
| Sunday | 79°F | Mostly Cloudy | 2 to 6 mph NW | 0% |
| Sunday Night | 54°F | Mostly Cloudy | 6 mph W | 0% |
| Monday | 81°F | Mostly Sunny | 2 to 7 mph SW | 0% |
| Monday Night | 54°F | Partly Cloudy | 2 to 7 mph SW | 0% |
| Tuesday | 83°F | Sunny | 2 to 7 mph SW | 0% |
| Tuesday Night | 56°F | Mostly Clear | 2 to 7 mph SW | 0% |
| Wednesday | 91°F | Sunny | 2 to 8 mph SW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 1 to 8 mph N | 0% |
| Thursday | 94°F | Sunny | 1 to 9 mph W | 0% |
| Thursday Night | 60°F | Mostly Clear | 3 to 9 mph WNW | 0% |
| Friday | 87°F | Sunny | 5 to 9 mph W | 0% |
| Friday Night | 56°F | Partly Cloudy | 5 to 9 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Jose, CA
Last spring frost
May 3
First fall frost
Nov 18
Growing season
197 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, Mt Hamilton, Ca (10.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.