Yes, many common outdoor furniture materials can become uncomfortably or even dangerously hot when placed in direct sunlight. The extent of heat absorption depends primarily on the material, color, and finish.
Dark-colored metals, like wrought iron or aluminum, and certain plastics can reach extremely high temperatures, making them unpleasant to touch. Traditional wood can also become quite warm. Materials that generally stay cooler include light-colored woods (like teak), all-weather wicker, and specially designed polypropylene resins. Fabrics are less of an issue if they are breathable and quick-drying.
To prevent overheating, consider using light-colored cushions, positioning furniture in shaded areas, or utilizing protective covers and umbrellas. The most effective long-term solution is to choose furniture specifically made from materials with low heat retention properties for your sun-drenched patio or deck.