According to the 2023 USDA Hardiness Zone Map Honolulu County, Hawaii is in Zones 11b (45°F to 40°F), 12a (50°F to 45°F), 12b (55°F to 50°F) and 13a (60°F to 55°F). There is no change from the 2012 USDA Hardiness Zone Map which has Honolulu County in also in Zones 11b (45°F to 40°F), 12a (50°F to 45°F), 12b (55°F to 50°F) and 13a (60°F to 55°F).