Generally speaking, the weather in India can be divided into three seasons – summer, winter and monsoon. The coolest and driest time of the year to visit is between October and February, which is regarded as the winter season and seen by many as the best time to visit India. During this time temperatures are cool and dry, making the ideal conditions to take in the highlights and hidden gems of India. Temperatures will always be warmer in the south, with comfortable coastal beach weather.
Following winter is the summer season which is hot and dry, lasting from March through to May, when temperatures reach their peak. During this time the thermometer can be intensely warm in the central and southern reaches of the country, making it an excellent time to head to the north and higher altitudes of the Himalayas, and the lofty hill stations of Shimla and Darjeeling.
May signals the start of the monsoon season, which begins in Kerala on the south-western coast, bringing with it regular downpours interspersed with sunny hot intervals that gradually work their way up the country. It is very humid during this time of year and the days are punctuated by intermittent rainfall. At the height of monsoon season there can be flooding in some lowland regions and most national parks close during this time (excluding Periyar, which remains open). Come November and December another monsoon hits southern India, sweeping in from the Bay of Bengal. The states of Kerala, Tamil Nadu and Karnataka receive most of their rainfall during this time.