Question

if the Himalayas were not situated where they are now how would the climatic conditions of the Indian subcontinent be

Answer 1

This would have affected and changed the way we perceive India as we do today.
First of all, the major rivers like Ganga, Yamuna, Indus would never come into existence. Imagine India without these rivers!
Secondly, there would be changes in the climatic conditions as well.
Third, if the Himalayas weren't situated at the borders of China and Nepal, then China would have captured Nepal as it had captured Tibet and Mongolia!

Answer 2

1) The Himalayas affect the climate of India by blocking cold air blowing from the North that comes from Siberia and Central Asia.

2) Without the Himalayas, India would get cold temperature in the winter months.

3) The Himalayas form a natural barrier that prevents monsoon winds from going further north.

4) The Himalayas are reason for summer rains and monsoon type climate in the regions that are beyond the Western Ghats of India.

5) In its absence this region would have remained drier.

6) India would have been a tropical desert.