You might imagine that the weather is always nice in Rome, and it is almost true. During the winter months it can of course get cold, but snow is not very normal in the Italian capital. Therefore it always become big chaos every time the snow fall, so on a snowy day, use the metro in Rome instead.
In July and August it gets a bit too hot, so make sure to book a hotel with air condition in this period, and it is also great if you book a hotel with an outdoor swimming pool in this period. In our opinion the best months to visit Rome are May, June, September and October.