Question

why does the rainfall decrease from the east to the west in Northern India

Answer 1

The rainfall decreases from east to west in northern India because of the following reason:

The inflow of the south-west monsoon into India is such that the windward side of the Western Ghats receives very heavy rainfall, more than 250 cm. The rain shadow region receives scanty rainfall and the moisture laden clouds shed the maximum rainfall of this season in the north-eastern part of the country. Thus, Mawsynram in the southern ranges of the Khasi Hills receives the highest average rainfall in the world. Rainfall in the Ganga valley decreases from the east to the west. Hence, Rajasthan and parts of Gujarat which are on the western get scanty rainfall.

Answer 2

Rainfall decreases from the east to the west of Northern India due to the reason for reducing the monsoon humidity of the winds. The maximum rainfall during the monsoon period but moister winds of the Bay of Bengal moves further island. Moisture wind of Bay Bengal travels through other parts of the country, these winds have least amount of moisture, which leads to decrease from rainfall . All are considered this the main reason leads to progressive decrease of rain fall from east to west.