The seabreeze colliding with the mountains in South India likely results in significant cloud cover, which cools the surface by reflecting sunlight. You can see

The seabreeze colliding with the mountains in South India likely results in significant cloud cover, which cools the surface by reflecting sunlight. You can see here that the southern region has less total sunlight per year (lighter = cloudier): https://en.wikipedia.org/wiki/Sunshine_duration#/media/File:Globalcldfr_amo_200207-201504_lrg.jpg https://en.wikipedia.org/wiki/Sunshine_duration#/media/File:...