Insofar as humidity exists everywhere... I suppose it is.
Speaking as somebody who's lived where humidity is stupidly annoying... no, it's not. And those of us who have experienced real humidity love it for that reason. We love getting out of really bad humidity.
I mean, I suppose it could get humid. I've only visited. I also suppose any coastal area could get humid, due to proximity to the ocean. But the South ain't playing when it comes to humidity, and that's what I meant.
I'm sure some are, but I stand by my assertion that I've met flat-earthers who were simply sceptical and pushing that particular point of view.
This was also when they were new. I'm not sure if those people represent the whole or if I just met an outlier (and online, at that, where anyone can say/claim anything). I certainly don't mean to speak about all of them.