Enough said... at least according to this study:

High Temperature and High Humidity Reduce the Transmission of COVID-19

more...

09 March 2020

Jingyuan Wang, Beihang University (BUAA)

Ke Tang, Institute of Economics, School of Social Sciences, Tsinghua University

Kai Feng, Beihang University (BUAA)

Weifeng Lv, Beihang University

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3551767