Short answer: yes, a painted metal urban bench can get too hot to sit on in direct summer sun, especially if it has a dark finish. Metal absorbs heat quickly and releases it slowly, and paint color plays a huge role. On a 95°F day, a black or dark blue painted bench can easily reach 160°F to 180°F, while a white or light-colored bench may stay 20°F to 40°F cooler. That is still hot, but often tolerable for a quick sit.
The actual surface temperature depends on several things. Direct sunlight is the biggest factor; even a light bench becomes uncomfortable if it has been baking for hours. Air temperature, wind, and humidity also matter. In humid, still conditions, the bench feels hotter because sweat does not evaporate as quickly, and the metal is not cooled by moving air. Location matters too. A bench on open asphalt or concrete surrounded by heat-reflecting buildings will get hotter than one under a tree or near shade.
Paint type makes a difference but doesn’t solve the problem. Standard alkyd or acrylic paints protect the metal but still allow heat absorption. Some reflective or infrared-reflective coatings can reduce surface temperature by a noticeable amount, but they are more common on roofs than public benches. Powder coating, which many urban benches use, is durable and can be formulated in light colors that stay cooler, but it still heats up in strong sun.
If you manage or buy outdoor seating, choose light colors and place benches where they get afternoon shade. Perforated metal or slatted designs also help because they allow airflow and drain heat faster than a solid slab of metal. Adding a nearby tree, shade sail, or even a light-colored cushion can make a bench much more usable. If you are just trying to sit, test the surface with the back of your hand first, or keep a thin towel or cloth in your bag during summer.
So yes, painted metal benches can absolutely become too hot to sit on. With light paint, good placement, and some shade, they can stay comfortable enough for normal use, but on a blistering sunny day, any metal surface deserves a quick touch test before you commit.