According to the 2023 USDA Hardiness Zone Map Glen Burnie, Maryland is in Zones 7b (5°F to 10°F) and 8a (10°F to 15°F). This is a change from the 2012 USDA Hardiness Zone Map which has Glen Burnie in Zones 7a (0°F to 5°F) and 7b (5°F to 10°F).