The short answer is: it depends entirely on the materials and construction. Not all outdoor furniture is created equal for permanent, year-round exposure in a wet urban environment. For true resilience, you must seek out pieces specifically designed as all-weather or year-round outdoor furniture.
Key materials that can withstand constant rain include powder-coated aluminum, which resists rust and corrosion; high-quality synthetic wickers like PE rattan that won't mold; and dense hardwoods like teak or acacia, which contain natural oils. Stainless steel with a high grade (e.g., 304) is also excellent. Crucially, avoid furniture with untreated iron, low-grade steel, or fabrics that aren't explicitly quick-dry and UV-resistant.
Beyond material, construction is key. Look for waterproof cushions with drain holes, tightly woven fabrics, and finishes that protect joints. Even durable furniture benefits from protective covers during extreme weather to prolong its life. With the right investment in weather-resistant furniture, you can enjoy a stylish urban oasis 365 days a year, rain or shine.