Weather | 13–23°C (55–73°F), warm but still comfortable | 18–29°C (64–84°F), hot afternoons and bright evenings | 21–32°C (70–90°F), peak heat and stronger midday sun |
Atmosphere | Spring city-break energy | Summer evenings, outdoor dining, packed piazzas | Slower afternoons, later dinners, more heat-avoidance planning |
Key events | Spring exhibitions, outdoor events ramp up | Republic Day, summer festivals, riverfront openings | Summer concerts, open-air cinema, deeper summer programming |
Budget | Rising, but still softer than summer peak | Higher than May, especially central hotels | Similar or slightly higher for well-located stays |
Best for | Sightseeing-heavy trips on foot | First visits, long evenings, mixing ruins with nightlife | Late-night city breaks and museum-heavy planning |
Book early? | Good idea for Vatican and Borghese | Yes, definitely for Vatican, Colosseum, Dome, and Borghese | Essential for headline attractions and shaded central hotels |
Transport tips | Comfortable walking month | Use metro and taxis more at midday; refill water often | Avoid long exposed walks from 1pm–5pm |