Whether you can leave your urban outdoor furniture outside all year depends primarily on the materials it's made from. High-quality, weather-resistant materials like powder-coated aluminum, teak, acacia, certain all-weather wickers, and stainless steel are designed to withstand sun, rain, and temperature fluctuations. For these types, year-round exposure is generally acceptable, though using protective covers during harsh winter months or extreme weather is highly recommended to prolong their life and appearance.
However, furniture made from materials like untreated iron, which can rust, or standard cushions with non-weatherproof fabric, should not be left exposed. For mixed-material sets, the weakest component dictates the care. The rule of thumb is to check the manufacturer's warranty and care instructions. Even with durable furniture, basic maintenance like regular cleaning and occasional sealing (for wood) is crucial. In climates with severe winters, storing cushions, umbrellas, and less resilient pieces indoors or in a dry shed is always the safest choice to ensure your investment lasts for many seasons.