San Marco in October

April through June and September through October offer the sweet spot – warm weather without the crushing summer crowds. July and August bring 30°C heat, packed squares, and inflated prices. But here's what guidebooks won't tell you: winter has its own magic. December through February means fog-shrouded canals, empty piazzas, and hotel rates dropping by half. Just pack waterproof boots for acqua alta (high water flooding). The worst time? Late October through November when rain is constant and many restaurants close for maintenance. Carnival season in February draws massive crowds but creates an otherworldly atmosphere if you can handle the chaos.