April /May is summer time there.. so its going to be hot.. Id rather say Humid.. Alternatively there are Service Apartments that give u a good deal if your staying there for a month or so.

Second of all.. South India is a place where most of the cash crops are grown.. so you should always find fresh vegetables and Flesh that are frozen foods here.

About hygeine.. choose the kind that fits your bill. Medical and expenses are also not that high.. If your indian and have a Medical Insurance.. most of it should be take care