It depends on which part of India if you wish to visit. In case you are interested in visiting Ladakh or other parts of Himalaya then summer season is the best time. If you want to visit Rajasthan, other parts of North India or Souht India then winter season ( October till March ) is ideal period. Even travelling during monsoon months (July – September) is also not a bad idea to visit Rajasthan and other places it presents a good tourism opportunity during this time as one can stay at Luxury or Palace hotels without spending a fortune during those months.