Upvote:3
The currently-top-rated answer to the question you link, Chile's Route 27, is "open throughout the year, although occasionally closed by snow", according to Wikipedia.
Part of the road is in the driest nonpolar desert in the world and so rarely sees precipitation of any sort, but the higher parts of the road are in the mountains and get more varied weather. (Although, when I visited, it had just rained for the first time in years, so everything was closed in order to protect lives.)