Rome experiences extremely hot summers, while its winters are milder and rainy.
The peak months of June and July see an influx of tourists, with huge crowds and queues around the major tourist attractions. Temperatures peak in July and August. Low season brings fewer crowds and milder weather, but rain should be expected.
While in general, a liberal attitude prevails towards dress, particularly in the summer months, dress codes in churches and cathedrals are strictly enforced.
When visiting the Vatican or other famous religious sites modest dress should be observed, and knees and shoulders should be covered.