According to the 2023 USDA Hardiness Zone Map Big Lake, Alaska is in Zones 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 Big Lake in Zones 3a (-40°F to -35°F), 3b (-35°F to -30°F) and 4a (-30°F to -25°F).