your answer :
because all these cities have settled very close to the sea. Proximity to sea keeps weather humid and humid weather by its very nature, contains lots of moisture. As a result, the air surrounding us does not have any capacity to absorb our sweat.
You ought to know one thing in this context. All of us are sweating all the time. Do you recall what we learned in our school books? One of the key functions of skin is to regulate body temperature through sweating.
all of us sweat all the time and a large part of our body toxins are thrown out in the process. When the air around you is dry and cool, it has capacity to accommodate the moisture in the form of our sweat. So, in cities like Pune, Delhi or those in Rajasthan, our sweat evaporates so rapidly that we don't feel its presence in the form of sweat. However, the same process of evaporation of our sweat is very slow or non existent in coastal cities like Mumbai, Kolkata, Chennai or Cochin due to high humidity as mentioned before. Hence the sweat is seen and felt in these cities.
