There is something to it, I just don't know why nobody is talking about it much. It's pretty painfully obvious if you start digging into the data, researching the outbreak map, and looking at the temps & humidity levels in the areas. SARS-CoV-2 appears to more or less be obeying what influenza does when it comes to seasons, temps, and humidity (along with perhaps sunsine / vitamin D as a factor).
NYC should be cranking humidifiers, pushing humidity up to 50% in every space where people exist (except hospitals). It'll dramatically slow the infectiousness of SARS-CoV-2 imo. Super low human space humidity is the best friend of a respiratory virus.
Why aren't San Antonio and Houston buried in cases? Same reason Mexico and Los Angeles are not (relatively speaking, and especially compared to eg NYC).
Las Vegas should be buried in cases, they have tons of international traffic, a zillion opportunities for the virus to be transited around, spread to casino workers and everywhere. Their ICUs should be overflowing to an epic degree. Las Vegas has an inverted humidity map, peak humidity there is November to March, and avg high temps stay up near 55 to 60 degrees (influenza at least hates temps over ~60-65+ F).
How about Santa Fe or Phoenix? Super low case loads, as with Houston and Austin and other similar locations.
Florida isn't seeing a particularly bad outbreak in its cities.
Albuquerque and Phoenix have inverted humidity seasons, their peak humidity times are roughly October/Nov to March.
Wuhan's low sunshine season is November to March. Temps are often well below 50 degrees during that period (and essentially never get to 65+), not high enough to interfere much with influenza or probably SARS-CoV-2. It gets cold enough during flu season there to require persistent indoor heating, which dries everything out, lowering indoor humidity levels dramatically, amplifying potential infectiousness.