According to the 2023 USDA Hardiness Zone Map Medford, Oregon is in Zones 8a (10°F to 15°F) and 8b (15°F to 20°F). There is no change from the 2012 USDA Hardiness Zone Map which has Medford in also in Zones 8a (10°F to 15°F) and 8b (15°F to 20°F).