The lack of rain in Gridania can be attributed to the cooperation between Gridanians and Elementals, but that's sort of a lazy excuse. I like the idea of rain or wind storms in towns, although the walls of Ul'dah are too high for sand storms. I read that briefly in the end of April there was rain everywhere at once, even in towns, as one of the strange occurrences related to the Seventh Umbral Era.

I'd also like to see heat waves. Anywhere.