Yes, in most cases you can use urban outdoor furniture on a deck that gets very hot underfoot, but I wouldn’t just drop it down and forget about it. The furniture itself is usually designed for patios, rooftops, and balconies, so sun and heat are part of the job. The bigger risks are comfort, heat transfer, and small points of pressure where legs meet the deck.
First, think about what “hot” means. If the deck is too hot to stand on barefoot, metal furniture will likely be too hot to touch or sit on, especially dark powder-coated steel or aluminum. Light-colored pieces stay cooler, and slatted or mesh seats release heat better than solid cushions. Resin wicker, HDPE, teak, and powder-coated aluminum are generally good urban outdoor choices; just check the manufacturer’s heat notes and avoid cheap plastic that can soften or warp.
Second, protect the deck surface. Thin metal legs can concentrate weight and leave marks, especially on composite decking that softens in strong sun. Use wide, heat-resistant furniture pads or glides under every leg. Avoid rubber pads that can stick or stain; felt or composite glides are usually safer. A breathable outdoor rug or interlocking deck tiles can also create a cooler barrier, but make sure water can still drain and the rug does not trap heat or moisture.
Third, control the microclimate. A parasol, awning, pergola, or shade sail makes a huge difference. Move furniture to shaded areas during peak afternoon sun, and choose cushions that can be brought inside or stored in a deck box. If the deck is hot enough to burn bare feet, I’d also avoid leaving pets or children out there, and check the surface temperature before sitting down.
Finally, don’t ignore stability. Heat can make some deck boards and furniture feet expand slightly, so leave a little room around legs and check fittings over time. If the furniture feels wobbly, hot, or sticky, move it or add a barrier. With shade, sensible materials, and protective feet, urban outdoor furniture can absolutely work on a hot deck—just treat the deck as part of the setup, not just the background.