In most cases, yes—but I would not simply leave it there and hope for the best. Urban outdoor furniture can usually stay outside while a building is being painted, especially if the work is on upper floors and the weather is calm. The real question is whether the furniture will be exposed to paint overspray, solvent fumes, dust, drips, windblown debris, or extra foot traffic. If painters are working near balconies, ground-floor walls, railings, or courtyards, I’d move lightweight chairs and tables indoors or at least pull them several feet away from the facade.
For benches, planters, and other heavy pieces that are hard to move, cover them with breathable tarps or drop cloths and secure the covers so they do not flap around or trap moisture. Plastic sheeting can work for a short dry period, but breathable fabric is usually safer for wood, metal, and cushions. Remove loose cushions and textiles anyway—they absorb fumes and overspray. If the crew is using strong solvents or spray paint, ask them what protection they recommend and whether the furniture should be relocated entirely.
Also keep safety and access in mind. Do not let furniture block fire exits, walkways, or the painters’ equipment. If scaffolding goes up, the layout may need to change. In busy urban areas, theft and vandalism are another reason to secure or store movable pieces. Think of outdoor furniture protection as part of renovation safety, not an afterthought. Finally, confirm the painting schedule and check the furniture afterward for fine overspray; it is much easier to clean before it cures. So the short answer is yes, it can stay outside—but with sensible protection, a quick chat with the contractor, and a plan for moving anything valuable or delicate.