Yes, it can fade faster in a really sunny city, but “quickly” depends a lot on the materials, finish, and how the furniture is cared for. Strong UV exposure breaks down pigments and coatings over time, so cheap untreated plastic, low-grade fabric, and poorly coated metal are the pieces most likely to look washed out after a season or two. Quality urban outdoor furniture is a different story.
If you are choosing pieces for a sunny balcony, rooftop, or courtyard, look for UV-resistant materials such as solution-dyed acrylic fabric, UV-stabilized HDPE, powder-coated aluminum, and teak or other hardwoods with proper oiling. These materials can still change slightly over the years, but they usually fade much more slowly and age with a bit of character instead of failing fast. Cushions and slings are often the first things to show sun damage, so invest in replacement covers or fabrics that are made for direct sun.
Shade and simple habits make a real difference too. A pergola, umbrella, or awning can reduce direct UV exposure during the hottest part of the day, and breathable furniture covers help when the pieces are not in use. Clean surfaces with mild soap and water, avoid harsh chemicals, and store cushions during long spells of intense sun if you can. In a very sunny city, no outdoor furniture will stay showroom-new forever, but UV-resistant materials and a little care will keep it looking good for much longer.