The year 2017 was a below normal Monsoon year while 2016 saw normal Monsoon rains. Meanwhile, 2015 was a drought year. The year 2018 is expected to be a normal Monsoon year.
The month of June is the onset month, however, this year, Monsoon arrived over Kerala early on May 28. Usually, the pace of Monsoon differs each year.
For instance, in the year 2015 until June 13, the country had recorded 53.1 mm of rain against 50.5 mm resulting in a surplus of 4 percent. Meanwhile, the entire month that year saw 189.5 mm of rains against 163.6 mm causing surplus rains of 16 percent.