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