Average heat index is expected to rise up to 55° C with certainty of rising number of Heat stroke cases.
Heat index unlike room temperature isthe real feel when one is exposed to direct sunlight. On an average, it is 8-10° ahead of room temperature.
Thus, the average length of the day along with sunshine of 8hrs/day would be 12.6 hrs for April. So, this will lead to average humidity by 66% for the month of April.