According to the 2023 USDA Hardiness Zone Map San Francisco, California is in Zones (), 10a (30°F to 25°F) and 10b (35°F to 30°F). This is a change from the 2012 USDA Hardiness Zone Map which has San Francisco in Zones 10a (30°F to 25°F) and 10b (35°F to 30°F).