Rome's mild climate makes it visitable year-round; however, spring and autumn are without doubt the best times to visit, with generally sunny skies and mild temperatures (although late autumn, November, can be rainy). July and August are unpleasantly hot (many Romans desert the city in August so many businesses close at this time); from December to February there is briskly cold weather, although it's rarely grey and gloomy.
| Month | Temp (°C) | Rainfall (mm) | Humidity (%) | Sunshine (hours) |
| Jan | 5 - 11 | 71 | 4 | |
| Feb | 5 - 13 | 62 | 4 | |
| Mar | 7 - 15 | 57 | 6 | |
| Apr | 10 - 19 | 51 | 7 | |
| May | 13 - 23 | 46 | 8 | |
| Jun | 17 - 28 | 37 | 9 | |
| Jul | 20 - 30 | 15 | 11 | |
| Aug | 20 - 30 | 21 | 10 | |
| Sep | 17 - 26 | 63 | 8 | |
| Oct | 13 - 22 | 99 | 6 | |
| Nov | 9 - 16 | 129 | 4 | |
| Dec | 6 - 13 | 93 | 4 |