When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Trivandrum is roughly greater than that of Bologna. You can assume this to be the case over the next 19 days.
With an average temperature of 34 °C, peak weather can be found in March. As a traveller, expect to see changes in flight prices during that period. The temperatures in Bologna are colder than in Trivandrum.