Whether your urban outdoor furniture can withstand being left outside all winter depends on several key factors. The primary consideration is the material. Powder-coated aluminum, stainless steel, teak, and high-quality synthetic resins like poly lumber are generally built to endure moisture and cold. Furniture made from wrought iron requires a flawless, intact finish to prevent rust. Conversely, materials like untreated wood, wicker (unless all-weather resin), and standard steel are highly susceptible to damage from snow, ice, and freeze-thaw cycles and should be stored.
Construction quality is equally important. Look for tight, rust-proof fasteners and fabrics labeled as solution-dyed acrylic for UV and moisture resistance. Even durable furniture benefits from protective measures: thorough cleaning, applying protective oils (for teak), and using fitted, breathable covers can significantly extend its life. For cushions, always store them indoors in a dry place.
Ultimately, consult the manufacturer's care instructions. If your furniture is made from weather-resistant materials and is properly maintained, it can often stay outside, saving you storage effort. If it's lightweight, made from sensitive materials, or you experience harsh winters with heavy snow and salt, indoor storage is the safer choice to ensure your investment lasts for many seasons.