The tourist crowds in Rome are at their minimum between October and April, making accommodation rates much cheaper as well. This makes it one of the best times to visit the city. While you will certainly need warm clothing, the temperatures rarely drop below 0 degrees Celsius. You can also catch key events in Rome such as the Christmas Blessing of the Pope in December or celebrate a grand New Year's Eve in Rome. The Rome marathon in April is also a fun event to attend. 

If you’d prefer relatively warmer weather, May and September are also good months to visit Rome since the humidity is manageable and a moderate number of tourists visit the city at this time. The International Horse Show and the Literature Festival are generally held in May. The famous White Night of Rome, an all-night arts festival, is conducted in September.

If you purchase a single transport card or ticket in Rome, you will have access to nearly all means of public transport in the city. ATAC, a transport company, operates almost all of the public transport systems excluding airport transport and taxis. This includes subways, trains, buses, light rail, and trams. Due to this, the same ticket will allow you to use all of these transport systems.

You can also purchase a hop-on hop-off ticket from Tickets-Rome.Com  if you are planning on visiting multiple attractions in a short span of time.

• Explore the Vatican Museum and the Sistine Chapel in a leisurely manner.
• Walk around the Colosseum and admire its imposing columns.
• Climb to the top of St. Peter’s Basilica and get a panoramic view of the city.
• Witness the opulent Roman Forum or walk up the Spanish Steps.
• Enjoy an Aperol Spritz at the Piazza Navona.
• Feast on cheese, prosciutto and wine at the famous La Prosciutteria Trevi.
• Check out the Pantheon and other ancient Roman sites such as the Catacombs.
• Relish delicious gelatos at any of the various cafes dotted throughout the city.
• Eat pizza at Forno di Campo de Fiori, one of Rome’s oldest bakeries.

• Make sure that you always carry cash in Rome as the city still functions primarily as a cash economy.
• Dinner service usually begins after 8:30 PM in most restaurants, so make sure you grab a snack if you think you’ll be hungry earlier.
• Never spend any money on water. Simply use the water fountains around the city.
• Tipping is not a necessity. However, you are welcome to do so if you are pleased with the service.
• All state-owned parks, galleries, museums, and archeological sites are free on the first Sunday of every month.
• Always wear comfortable walking shoes when traveling in Rome as the streets are not paved evenly in most places. 
• Make sure you cover up your knees and shoulders when visiting churches in Rome or you risk being denied entry.