why are Thiruvananthapuram and Shillong rainer in June than in July

 in the first week in the first week of the June the Southwest monsoon enters into India from the south trivendrapuram being located at the southernmost part of India falls in the essay of monsoon winds at the earliest. Similarly Shillong Falls first in the way of the Bay of Bengal branch. That is why these two place receive more rain during June in the month of July the monsoon winds gradually move in in the interior of the Indian land mass