[AlotOfReading]

Waymo can indeed drive through rain and snow on narrow unmarked streets, as well as traffic jams and navigate obscure construction works with cyclists.

Other than snow, it does all of those things in SF. They do snow testing in Tahoe and Michigan, not to mention the former testing in NYC.

[xnx]

Also weather testing in Buffalo, New York. One of the snowiest cities in the US.