San Jose, CA Weather & Growing Conditions
Overnight
70°F
Clear
Clear, with a low around 70. South wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Clear | 2 mph S | 0% |
| Tuesday | 95°F | Sunny | 2 to 7 mph SSW | 0% |
| Tuesday Night | 69°F | Clear | 5 mph SSW | 0% |
| Wednesday | 90°F | Sunny | 2 to 6 mph SSW | 0% |
| Wednesday Night | 69°F | Clear | 1 to 5 mph WSW | 0% |
| Thursday | 89°F | Sunny | 1 to 7 mph SW | 0% |
| Thursday Night | 72°F | Clear | 1 to 6 mph W | 0% |
| Friday | 92°F | Sunny | 1 to 7 mph W | 0% |
| Friday Night | 72°F | Clear | 2 to 7 mph W | 0% |
| Saturday | 91°F | Sunny | 1 to 8 mph WSW | 0% |
| Saturday Night | 71°F | Clear | 2 to 8 mph WSW | 0% |
| Sunday | 87°F | Sunny | 2 to 8 mph WSW | 0% |
| Sunday Night | 66°F | Clear | 3 to 8 mph SW | 0% |
| Monday | 81°F | Sunny | 3 to 8 mph SSW | 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 (0.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.