Can you put together some actual data then? Like, get all the relevant data for hospitalizations and deaths by locality and find a correlation against climate data? And then do the same for things like density, how early and strictly social distancing measures were put into effect, etc., and see if it has more or less correlation than those?

My gut feeling here is that climate is not a significant factor, but that those others are. And you haven't come close to actually demonstrating it with rigor beyond it just being a guess that you have (which is fine; guesses are useful).

And you're right, the connection between climate and the spread of a disease is well known, which is why if it were relevant here there would be lots of people besides you talking about it. The articles you linked do seem to show that the virus might not survive for quite as long on surfaces at high temperatures and humidities, but that's just not really that relevant for how this disease spreads. People are primarily either inhaling droplets directly, or touching things that others have touched recently and then getting it into their face. The virus surviving for hours on a surface before being touched and then touched again to a face orifice was always on the long tail of transmission methods, so flattening that tail a little bit doesn't make a meaningful difference in the overall spread of the virus.