John Tlumacki/Globe Staff

Jeanette Newman of Boston, who was trying to limit her exposure to the sun, was under her umbrella in Copley Square.

John Tlumacki/Globe Staff

Women walked across Boylston Ave. in Copley Square on a sunny day.

John Tlumacki/Globe Staff

Similar to wide-brimmed hats, parasols can block harmful UV rays, according to a Massachusetts General Hospital dermotologist.

John Tlumacki/Globe Staff

Roslindale resident Josephine Adjei said her umbrella "provides good shade."