Late April to mid-June, and September. Spring and early autumn offer the most pleasant balance: comfortable temperatures (low-to-mid 70s°F / ~22–24°C), significantly fewer crowds than peak summer, and reasonable prices. September in particular benefits from post-summer calm, warm weather, and the spectacle of the Regata Storica and end of the Film Festival. WeatherSpark data confirms the tourism score peaks in mid-September
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 45 | 34 | cool & mostly dry |
| Feb | 48 | 36 | cool & changeable |
| Mar | 54 | 41 | cool & changeable |
| Apr | 62 | 49 | mild & changeable |
| May | 69 | 56 | mild & changeable |
| Jun | 78 | 64 | warm & changeable |
| Jul | 82 | 69 | warm & mostly dry |
| Aug | 81 | 68 | warm & changeable |
| Sep | 74 | 62 | warm & changeable |
| Oct | 65 | 54 | mild & changeable |
| Nov | 55 | 45 | cool & changeable |
| Dec | 47 | 36 | cool & changeable |