The intensity of the monsoon can vary year-to-year based on global climate patterns:
The Indian monsoon is not a single event but a four-stage seasonal cycle. monsoon winds india
This is the primary rainy season, arriving in Kerala around June 1st and covering the entire country by mid-July. Northeast Monsoon (Winter/Retreating Monsoon) Timing: October to December. The intensity of the monsoon can vary year-to-year