Florence is usually even hotter than Rome, which is also fairly near the sea. The Cinque Terre is absolutely heaving with tourists in August. I certainly wouldn't go there at that time of year.

Bologna, an easy train ride from Florence, has a long tradition of universities and student life, plus a famous pasta sauce which is the calling card for its noted cuisine.

Since you are traveling in August, you may want to consider lake Como or one of the other lakes. Temps should be a little cooler and the scenery is stunning. Easy travel through Milan.

THANK YOU again! I was just looking at Lake Como. I so much want to see Rome but at the same time am thinking a relaxing lake/or beach may be the best way to wind down this trip! Though I love seeing the sights, the long lines and throngs of tourists may ruin it for me :)