According to the 2023 USDA Hardiness Zone Map White Rock, South Dakota is in Zones 4a (-30°F to -25°F), 4a (-30°F to -25°F) and 4a (-30°F to -25°F). This is a change from the 2012 USDA Hardiness Zone Map which has White Rock in Zones 4a (-30°F to -25°F).