What clothes should girls wear when they travel to Italy in late April and early May?

You can check the weather forecast in Baidu one week in advance. Generally speaking, short sleeves+long sleeves. It won't be very hot there. In fact, it mainly depends on what style you usually wear. Try to avoid gray and beige, and don't blend in with those ancient buildings. Objectively speaking,

Italy

It is the fashion capital, either dressed in avant-garde fancy or simply black temperament route.