Interesting thing is, drugs, healthcare and medicinal facilities in western countries being so advanced everyone was convinced that the next pandemic would originate and spread fastly from third world countries... But it came from China which is a developed state and is spreading in western nations more fiercely than in third world countries. In India too disease mostly came from Italy.
Negligence on part of those who got infected has become the Major reason why this is getting spread.
Temperatures below 25deg Celsius won't do shit to this because in Australia it didn't. We don't about how it will fare under temperature 30deg Celsius or above. So we will have to wait for summers in Northern Hemisphere especially within sub tropical regions.
Also, this isn't deadly but very contagion. The equilibrium will achive only when common population will attain immunity towards it which could happen in upcomming few months and before vaccine development.....
In india, temple will rise to 35deg + so chances are good that it will help in check spread of virus. But.... people need to maintain social distancing