The answer depends on the specific materials and construction of your urban outdoor furniture, as well as the climate in your area.
First, check the manufacturer's label or product description. Many modern urban outdoor furniture sets are built with weather-resistant materials like powder-coated aluminum, teak, or all-weather wicker. These can typically withstand winter conditions, including snow and freezing temperatures, without significant damage. However, even durable materials may degrade over time if exposed to constant moisture, ice, and UV rays.
Second, consider your local winter climate. In regions with harsh winters—heavy snowfall, freeze-thaw cycles, or prolonged dampness—it’s generally safer to store furniture indoors or in a covered area. For milder winters, leaving it outside with a high-quality waterproof cover may be acceptable.
Third, examine the furniture's components. Cushions and fabric parts are rarely designed for all-winter exposure; they should be stored in a dry place. Metal frames with powder coating or stainless steel are more resilient, but wooden pieces may need sealing or oiling before winter.
Finally, think about maintenance. If you choose to leave furniture outside, clean it before winter, apply protective treatments, and use fitted covers. If you have space, storing it in a garage, shed, or under a patio awning will extend its lifespan.
In summary: if the furniture is explicitly labeled as "all-weather" or "winter-ready" and you live in a mild climate, you can leave it outside with covers. Otherwise, storing it is the safer choice to prevent rust, cracking, or fading.