According to the 2023 USDA Hardiness Zone Map East Quincy, California is in Zones 7b (5°F to 10°F) and 8a (10°F to 15°F). There is no change from the 2012 USDA Hardiness Zone Map which has East Quincy in also in Zones 7b (5°F to 10°F) and 8a (10°F to 15°F).