The answer is: it depends heavily on the furniture material and the protective measures you take. While it's possible, leaving furniture outside year-round in a snowy climate requires careful planning to prevent damage.
Not all outdoor furniture is created equal. Materials like powder-coated aluminum, stainless steel, teak, and high-quality all-weather wicker are most resilient. They resist rust, rot, and moisture damage. Conversely, untreated steel, iron, and standard wicker will deteriorate quickly.
Even durable furniture needs protection. Prolonged exposure to snow, ice, freeze-thaw cycles, and winter sun can cause cracking, fading, and mold. The best practice is to use high-quality, breathable, waterproof covers that are securely fastened. For extreme climates, storing cushions indoors and elevating furniture off wet surfaces is crucial.
For a worry-free solution, consider storing furniture in a shed or garage. If space is limited, grouping items together and covering them with a heavy-duty tarp system is a good alternative. Ultimately, with the right materials and proactive care, you can leave furniture outside, but proper winterization is non-negotiable for its longevity.