I’d start by looking at where the furniture sits, because in a city the sun and nearby walls often do more damage than the air temperature alone. Move seats into dappled shade from a tree, awning, pergola, or shade sail, and if you can’t move them, add a freestanding umbrella or a lightweight canopy. Reflective or light-colored covers help when direct sun hits metal or dark wood, but leave breathable gaps so heat doesn’t get trapped underneath.
Material matters. Metal, dark plastic, and sealed stone can feel scorching even when the air is pleasant. Choose powder-coated aluminium with light fabric, slatted wood, wicker, or mesh seats that let air move. Add breathable outdoor cushions rather than thick vinyl pads, and take cushions inside during the hottest part of the day. A simple light-colored cotton throw or a specially designed cooling mat can make a bench usable without holding heat.
Water and airflow are cheap fixes. A quick mist of water on a shaded stone or concrete surface can cool it briefly, but don’t soak cushions or wood. Set up a fan on a covered balcony, or arrange furniture to catch a cross-breeze. If your chairs are fixed in full sun, clip-on shade fabric or a small parasol can help. At peak heat, I’d also avoid using dark metal tables for food and drinks; use a lighter tray or cloth so the surface doesn’t burn.
Finally, plan for the long run. Plant climbing vines or tall grasses to shade seating, add a reflective furniture cover when items are not in use, and consider a pergola with adjustable slats. Keep furniture slightly spaced out so hot air can escape. On very hot days, I’d check surfaces with the back of my hand before sitting, and keep a folded light blanket or cooling pad nearby. The goal isn’t to make urban outdoor furniture ice-cold—it’s to remove trapped heat, block direct sun, and let air move so people can actually enjoy the space.