According to the 2023 USDA Hardiness Zone Map Steamboat Springs, Colorado is in Zones 4b (-25°F to -20°F) and 5a (-20°F to -15°F). This is a change from the 2012 USDA Hardiness Zone Map which has Steamboat Springs in Zones 4a (-30°F to -25°F), 4b (-25°F to -20°F) and 5a (-20°F to -15°F).