I’d start with shade, because in a city that’s half the battle. If you can, put seating under a pergola, shade sail, umbrella, or even a well-placed tree. On balconies and rooftops, a simple adjustable umbrella makes a huge difference because you can follow the sun instead of letting the furniture bake all afternoon. If the furniture is fixed, add shade where you can and move the smaller pieces into the cooler spots.
Material choice matters a lot. Dark metal benches and black plastic chairs soak up heat and stay hot long after the sun moves. Light-colored wood, resin, perforated metal, and woven outdoor materials tend to feel less punishing. If you’re buying new furniture, look for breathable designs and lighter finishes. For existing furniture, a light-colored cover or cushion can help, but take cushions inside when you’re not using them. Thick dark cushions hold heat, so thin cotton or mesh cushions are better for summer.
I also like to hose down or mist the surrounding patio area in the late afternoon, not the furniture itself unless the material can handle it. A misting fan works well on a balcony, and a damp towel over the back of a chair can make it feel more comfortable for a short sit. Just avoid soaking electrical outlets or making slippery surfaces. Finally, test the seat with your hand before you sit, and keep a lightweight throw or towel nearby. It sounds simple, but a little shade, lighter materials, and breathable cushions make urban outdoor furniture much easier to live with in summer.