According to the 2023 USDA Hardiness Zone Map Deltana, Alaska is in Zones 2a (-50°F to -45°F), 2b (-45°F to -40°F), 3a (-40°F to -35°F), 3b (-35°F to -30°F), 4a (-30°F to -25°F) and 4b (-25°F to -20°F). This is a change from the 2012 USDA Hardiness Zone Map which has Deltana in Zones 1b (-55°F to -50°F), 2a (-50°F to -45°F), 2b (-45°F to -40°F) and 3a (-40°F to -35°F).