Park chairs are designed to endure harsh weather conditions, including heavy rain. Most modern park chairs are made from weather-resistant materials such as aluminum, stainless steel, or high-density polyethylene (HDPE) plastic. These materials are rust-proof, UV-resistant, and can repel water effectively.

To handle heavy rain, park chairs often feature slatted designs or perforations that allow water to drain quickly, preventing pooling. Some chairs also have powder-coated finishes or treated surfaces to enhance water resistance. Regular maintenance, like cleaning and inspecting for damage, ensures longevity.

For added protection, some parks use removable covers or store chairs during extreme weather. Proper drainage systems in parks also help keep chairs dry. By combining durable materials and smart design, park chairs remain functional and comfortable even after heavy rainfall.