Yes, you can leave your wrought iron outdoor benches outside all year round, but it's not ideal without proper preparation and care. Wrought iron is durable, but it is susceptible to rust when constantly exposed to moisture, rain, snow, and changing temperatures.
For best results, start with a high-quality bench that has a good, intact powder-coated or painted finish. This is your first line of defense. To protect it through the seasons, consider these steps: First, clean the bench regularly with mild soap and water to remove dirt and debris that can trap moisture. Second, inspect it annually for any chips or scratches in the finish. Touch up any bare spots immediately with rust-inhibitive paint to prevent corrosion from starting. Third, during harsh winter months or prolonged rainy seasons, using a protective waterproof cover is highly recommended. While not always necessary in mild climates, a cover provides an extra barrier against the elements.
If you live in an area with severe winters, moving the bench to a sheltered spot like a garage or shed is the safest option. With consistent, simple maintenance—addressing rust spots promptly and keeping the finish sealed—your wrought iron benches can remain beautiful and functional in your garden for many years, weathering every season with grace.