According to the 2023 USDA Hardiness Zone Map Kent County, Rhode Island is in Zones 6b (-5°F to 0°F) and 7a (0°F to 5°F). This is a change from the 2012 USDA Hardiness Zone Map which has Kent County in Zones 6a (-10°F to -5°F) and 6b (-5°F to 0°F).