If you're shopping for an urban bench that won't feel like a griddle by mid-afternoon, material is everything. Dark metal and solid concrete are usually the worst offenders because they absorb and hold heat. The best options either have low thermal mass, light color, or natural insulating properties.
My top pick is solid wood—especially teak, ipe, or thermally modified ash. Wood doesn't conduct heat the way metal does, and slatted designs allow air to circulate. Go for a natural or light-toned finish; even dark wood can get warm, but it rarely becomes painful to sit on.
Recycled plastic lumber, often called HDPE, is another solid choice. It's common in parks and boardwalks, needs almost no maintenance, and stays cooler than metal. Choose light gray, tan, or white boards—dark recycled plastic can still get hot in full sun.
If you want a modern metal look, look for aluminum with a light powder-coated finish and perforated panels. Aluminum cools quickly once the sun shifts, and light colors reflect more heat. Avoid bare or dark steel, which can become dangerously hot.
Composite wood-plastic is a good middle ground. It looks clean and resists weather, but lighter colors work best. Benches with mesh or fabric sling seats also breathe well and don't store much heat.
Finally, don't underestimate placement and design. A slatted seat, a light color, or a simple shade element can make even an exposed urban bench much more comfortable in direct sunlight.