Venice in November

Everything is open all year! We love Venice in the winter. We've been in October, twice in December, once in Sept and once in April. By far winter is better: fewer crowds, and not hot. It may rain, but that can happen anywhere, right? It will require rain jackets, maybe gloves, scarves, Gortex shoes to ensure your comfort. Layer layer layer. With a longsleeve shirt, a fleece, a rainjacket layered, you can handle anything Venice can dish out.

I've been to Italy 3 times in November and I guess I was lucky - it did not rain a drop.
There were very large crowds of Americans during Thanksgiving week.
But, overall - fewer tourists in November.
Shorter lines etc.

Venetian ladies may break out their fur coasts in February, but winter hasn't really started yet in November.