San Jose, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Jose, a city in Santa Clara County, California.
Tonight
49°F
Mostly Clear then Patchy Fog
Patchy fog between 2am and 5am. Mostly clear, with a low around 49. East southeast wind 2 to 7 mph.
7-day forecast for San Jose
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear then Patchy Fog | 2 to 7 mph ESE | 1% |
| Wednesday | 69°F | Sunny | 2 to 10 mph NW | 1% |
| Wednesday Night | 49°F | Mostly Cloudy then Patchy Fog | 1 to 8 mph E | 1% |
| Thursday | 73°F | Patchy Fog then Mostly Sunny | 1 to 7 mph NNW | 0% |
| Thursday Night | 47°F | Clear | 2 to 6 mph NNE | 0% |
| Friday | 76°F | Sunny | 5 mph NNW | 0% |
| Friday Night | 50°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 79°F | Sunny | 2 mph NNE | 0% |
| Saturday Night | 50°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 77°F | Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Monday | 75°F | Mostly Sunny | 0 to 7 mph NW | 1% |
| Monday Night | 50°F | Partly Cloudy | 1 to 7 mph NNW | 1% |
| Tuesday | 75°F | Sunny | 0 to 5 mph N | 5% |
Forecast source: National Weather Service (api.weather.gov) for San Jose (37.296, -121.815). Updated through the day.
Growing snapshot for San Jose
Last spring frost
Jan 2
First fall frost
Dec 25
Growing season
362 days
Hardiness zone
9b
More local growing data for San Jose: nearby ZIP 95121 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Alum Rock
Burbank
Cambrian Park
Campbell
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East Foothills
East Palo Alto
Fruitdale
Gilroy
Los Altos
Los Altos Hills
Los Gatos
Loyola
Menlo Park
Milpitas
Monte Sereno
Morgan Hill
Mountain View
Palo Alto
San Martin
Santa Clara
Saratoga
Stanford
Sunnyvale
Climate data from the nearest NOAA station, San Jose, Ca (6 mi from San Jose). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.