We are in the initial planning stages of a trip to Italy from California. We plan to spend a couple of days in Rome (we've been there before) and reach Florence on 26th and stay there till the 31st. I'm trying to figure out if many of the attractions will be closed during the holidays. We enjoy walking, sightseeing, visiting historical buildings but not necessarily spending a lot of time in museums and galleries. Also, will the weather be reasonable for walking around? We would like to do a day trip to Siena if time permits. We will use public transport only.
Any suggestions/recommendations are much appreciated.