A helpful Freeper posted a link to an article recently that proposed that the actual mechanism that reduces viruses in summer is humidity and not temperature. I believe that summer in Saudi Arabia is probably very dry. Perhaps not the case in India; I don't know.
The paper I read used the word "sedimentation" to describe the idea that infectious droplets exhaled by an infected person could last longer in the air in less humid conditions. High humidity would preserve the size of exhaled droplets or possibly enlarge them. The larger, heavier droplets then settle quickly to the ground.
If low humidity causes droplets to decrease in size, this apparently allows them to stay suspended in the air for much longer and raises the chances of infecting a nearby person.
Houston is one of the most humid places, in the country...and, is (reportedly) having a huge summer spike.
Lots of outdoor protesting, a few weeks ago.