The cold has well and truely arrived in Italy. Most of the north is covered in ice and snow causing problems. Airports have been closed or are restricting flights. Roads are blocked and the number of accidents has gone up. It's not a good idea to travel to the north of Italy in these conditions as the population has been advised to stay in their houses if possible. The metro has been left open during the night to give shelter to the homeless.
Rome remains one of the few cities to have reasonable weather. Although colder than it has been for several years, the sun still pops out occassionally to brighten things up a little.
If you do plan to visit during this time be prepared for delayed transport and pack warm clothes.