My spouse and I will be spending 4 nights each in Florence, Rome, and Sorrento arriving Sept 23 and leaving Oct 5. We are planning on wearing jeans during the day in Florence and Rome, so that our knees are covered. In the evenings I plan on wearing dress/skirt with a light sweater or jean jacket. We are thinking it won't be too hot for jeans this time of year? We are planning on wearing shorts and being able to swim in Sorrento. Will this type of clothing work for the typical weather that these cities experience during the end of September?