This is a bit off... Sounds are detectable farther away in cold weather. Hot weather introduces more background static and thus signal is scattered and buried more efficiently.
That also sounds off because you're putting it as if yours is the only effect; don't you still have to combine what you say (less background noise, if I get it correctly - I do wonder about what SPL levels you're talking about here, and in any case they will be orders of magnitude smaller than sound produced by a train for instance, so does that noise still matter than?) and what the article says (inversion)? tldr; please elaborate, preferably with references.