It's always fun to look at the weather in a place you plan to travel to. Either you cheer (beautiful weather) or groan (I'm gonna roast).
I noticed that Florence has a range of 17C minima to 31 maxima.
That noise you hear is a groan, because it mirrors what we have here--and I try to stay out of the heat and stay in my A/C house. This is the main reason why gelato is such a big seller in Italy during summer. That and quiet, dark churches, which I noticed now charge for admission.