According to the 2023 USDA Hardiness Zone Map Summit Park, Utah is in Zones 5a (-20°F to -15°F), 5b (-15°F to -10°F) and 6a (-10°F to -5°F). There is no change from the 2012 USDA Hardiness Zone Map which has Summit Park in also in Zones 5a (-20°F to -15°F), 5b (-15°F to -10°F) and 6a (-10°F to -5°F).