ONE - ONE opening day game in Cincinnati got “snowed out”. 1979 against San Diego and it wasn’t snowed out. They played the game after a delay.
Cleveland, Boston, Montreal, Detroit, Toronto, Minneapolis, Chicago - all much more prone to snow on opening day.
No argument from me on any of those others. You can add New York and Pittsburgh to the mix -- or even the place most likely of all to have snow early or late in the season: DENVER.
Keep in mind that the MLB season used to start several weeks later than it does now. I believe it was only a few years ago that we saw the first regular-season game played in the month of March.