According to the 2023 USDA Hardiness Zone Map Sault Ste. Marie, Michigan is in Zones (), 4b (-25°F to -20°F) and 5a (-20°F to -15°F). This is a change from the 2012 USDA Hardiness Zone Map which has Sault Ste. Marie in Zones 4b (-25°F to -20°F).