San Jose, California is in USDA Hardiness Zones 9b and 10a

San Jose, California Hardiness Zone Map

San Jose Border
Zone 9b
25°F to 20°F
Zone 10a
30°F to 25°F

A hardiness zone is a geographically defined area in which a specific category of plant life is capable of growing, as defined by climatic conditions, including its ability to withstand the minimum temperatures of the zone.

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