San Jose, CA Weather & Growing Conditions
Today
91°F
Sunny
Sunny. High near 91, with temperatures falling to around 89 in the afternoon. Southwest wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Sunny | 2 to 6 mph SW | 0% |
| Tonight | 68°F | Clear | 3 mph S | 0% |
| Wednesday | 88°F | Sunny | 2 to 6 mph SW | 0% |
| Wednesday Night | 67°F | Clear | 1 to 5 mph WSW | 0% |
| Thursday | 86°F | Sunny | 1 to 6 mph WSW | 0% |
| Thursday Night | 70°F | Clear | 1 to 5 mph W | 0% |
| Friday | 90°F | Sunny | 1 to 7 mph W | 0% |
| Friday Night | 70°F | Clear | 1 to 6 mph W | 0% |
| Saturday | 90°F | Sunny | 1 to 7 mph WSW | 0% |
| Saturday Night | 70°F | Clear | 1 to 6 mph WSW | 0% |
| Sunday | 86°F | Sunny | 1 to 7 mph WSW | 0% |
| Sunday Night | 64°F | Mostly Clear | 2 to 6 mph SW | 0% |
| Monday | 81°F | Sunny | 3 to 7 mph SW | 0% |
| Monday Night | 59°F | Mostly Clear | 7 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Jose, CA
Last spring frost
Jan 2
First fall frost
Dec 25
Growing season
362 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, San Jose, Ca (7.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.