Yes, in most cases it is—but “usually” is doing some work there. Urban outdoor furniture is expected to survive rain, strong sun, temperature swings, pollution, and heavy use, so manufacturers tend to choose materials that can handle those conditions: powder-coated aluminum, stainless steel, teak or acacia, HDPE, concrete, stone, and synthetic rattan. Cushions and upholstery are often made with solution-dyed acrylic or other outdoor fabrics.
That doesn’t mean every piece is fully weatherproof. Budget street furniture or decorative items may use mild steel, thin coatings, or untreated wood that need more care. In busy urban settings, commercial-grade furniture is more likely to be specified because it has better finishes, stronger frames, and replaceable parts.
Maintenance still matters. Even weather-resistant materials can fade, corrode, or collect dirt in city environments. Regular cleaning, checking fixings, and storing cushions during extreme weather will extend their life. So the short answer is yes—urban outdoor furniture is usually designed with weather resistance in mind, but the level of protection varies with budget, material quality, and setting.