October is a great time to visit Italy, as the temperatures are mild and the crowds are fewer than in the summer months. The average maximum temperature is 23°C during the day, but it can drop to 11°C at night, so it's important to bring warmer clothes for the evenings. The further north you go, the colder it will be, and you may even find snow in mountainous areas. In the south, you can expect warmer temperatures and a lingering heat from the summer sun.
The countryside is especially beautiful in October, as you can enjoy the intoxicating smell of harvested crops without the summer crowds. This is a great time to explore Italy and take in its beauty without having to worry about the heat.