San Jose, CA Weather & Growing Conditions
Today
100°F
Sunny
Sunny. High near 100, with temperatures falling to around 97 in the afternoon. South wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 2 to 7 mph S | 0% |
| Tonight | 58°F | Clear | 6 mph S | 0% |
| Wednesday | 96°F | Sunny | 2 to 6 mph SW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 1 to 6 mph WSW | 0% |
| Thursday | 95°F | Sunny | 1 to 8 mph WSW | 0% |
| Thursday Night | 61°F | Clear | 2 to 8 mph WNW | 0% |
| Friday | 97°F | Sunny | 2 to 8 mph WNW | 0% |
| Friday Night | 64°F | Clear | 2 to 8 mph WNW | 0% |
| Saturday | 96°F | Sunny | 2 to 8 mph W | 0% |
| Saturday Night | 64°F | Mostly Clear | 2 to 8 mph WSW | 0% |
| Sunday | 92°F | Sunny | 2 to 9 mph WSW | 0% |
| Sunday Night | 59°F | Mostly Clear | 5 to 9 mph SW | 0% |
| Monday | 86°F | Sunny | 5 to 8 mph SSW | 0% |
| Monday Night | 55°F | Mostly Clear | 5 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 (10.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.