If it didn't snow in the parts of the world where it usually does, what would happen?

There would be an impact on the environment since areas that get a lot of snowfall count on it for a source of water, but the vegetation could eke out one or two low- or no-snow years.

It would cause shortages of water and possible rationing. Snow is essential to our getting a good water source.

More stupid people would survive and the general population would get less intelligent over time. Think that through before you mod it. It’s true.

The winter sports industry would be screwed.

Scientific models of weather and climate are complex and difficult even without hypothetical counterfactuals such as this. So I think it’s nearly impossible to assess. I agree with others that freshwater normally supplied by melting glaciers and snow pack, which in turn is the result of snowing—would be severely impacted. But then there’d presumably be greater rainfall in those same areas… Who knows?!

Our planet’s albedo would increase impacting global warming.

There would be more drought because the snow pack would no longer gradually distribute water during the growing season. There would be more desertification. Food would become more expensive. Water rationing would become more common.

And, together with having less white stuff to reflect the sun’s energy back into space, the desertification would contribute to an accelerating global warming problem.

If we didn’t watch out, the dinosaurs might come back! ;)

@mattbrowne Good point about albedo—though without new snow albedo would decrease (reflect less light) to cause further warming, as per @wundayatta.

The reverse scenario is “iceball Earth” where ice formation looks white from space, increasing albedo, reflecting more sunlight, lowering temperature until reaching a permanently frozen equilibrium.

@gasman – Yes, more snow keeps the Earth a little cooler. Too much of it turns it into a freezer.