San Jose, CA Weather & Growing Conditions
Overnight
70°F
Clear
Clear. Low around 70, with temperatures rising to around 73 overnight. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Clear | 7 mph S | 0% |
| Tuesday | 87°F | Haze then Sunny | 2 to 7 mph S | 0% |
| Tuesday Night | 69°F | Clear | 1 to 6 mph S | 0% |
| Wednesday | 82°F | Sunny | 1 to 5 mph SW | 0% |
| Wednesday Night | 69°F | Clear | 1 mph SW | 0% |
| Thursday | 81°F | Sunny | 2 mph WSW | 0% |
| Thursday Night | 73°F | Clear | 5 mph WNW | 0% |
| Friday | 85°F | Sunny | 5 mph WNW | 0% |
| Friday Night | 73°F | Clear | 1 to 5 mph WNW | 0% |
| Saturday | 85°F | Sunny | 1 to 5 mph W | 0% |
| Saturday Night | 73°F | Clear | 3 mph WSW | 0% |
| Sunday | 81°F | Sunny | 1 to 5 mph WSW | 0% |
| Sunday Night | 68°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 74°F | Sunny | 5 mph SSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Jose, CA
Last spring frost
Feb 2
First fall frost
Dec 6
Growing season
310 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, Los Gatos, Ca (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.