In the case of the monsoon, the cause is primarily orographic, due to the presence of highlands in the path of the winds. Orographic barriers force wind to rise. Precipitation then occurs on the windward side of the highlands because of adiabatic cooling and condensation of the moist rising air. The summer monsoon is associated with heavy rainfall. It usually happens between April and September. As winter ends, warm, moist air from the southwest Indian Ocean blows toward countries like India, Sri Lanka, Bangladesh, and Myanmar. The summer monsoon brings a humid climate and torrential rainfall to these areas. Relief rainfall occurs when warm moist air rises over mountains from the Atlantic Ocean. It cools and condenses as the warm air rises, to form clouds, which carry rain. It descends and warms until the air has passed over the mountains. That's why it is called Relief rainfall. Most of the rainfall in Asia is caused by the summer monsoon. In winter, the westerly’s cause rainfall in the Western Asian countries. Eastern parts of China, the Philippines, and Malaysia etc. receive rainfall from tropical cyclones. The rainfall is a result of the convergence of wind flow from the Bay of Bengal and reverse winds from the South China Sea. The onset of the monsoon occurs over the Bay of Bengal in May, arriving at the Indian Peninsula by June, and then the winds move towards the South China Sea.

In India, the monsoon is caused by differing temperature trends over the land and ocean. During the monsoon, the wind direction reverses. The gain in altitude of the clouds results in a drop in temperature, bringing about rain.Summer monsoon winds blow over warm oceans and bring rainfall to India because it carries abundant moisture. Apart from the extreme northwest, these winds cover the entire country in a month. In the case of the monsoon, the cause is primarily orographic, due to the presence of highlands in the path of the winds. Orographic barriers force wind to rise. Precipitation then occurs on the windward side of the highlands because of adiabatic cooling and condensation of the moist rising air. The southwest monsoon winds bring rainfall to India. It is important because agriculture in India is dependent on rainfall. A good amount of rainfall brings bountiful and adequate crops. The monsoon, which is essentially the seasonal reversal in wind direction, causes most of the rainfall received in India and some other parts of the world. The primary cause of monsoons is the difference between annual temperature trends over land and sea. Due to Indias location in the tropical region, most of the rain is brought by monsoon winds. Thus, the climate of India has broadly been described as a Monsoon type. The reason why India has a monsoon type of climate is that the country's climate is influenced by the monsoon winds or the changing weather conditions. It is the differential heating of land and water bodies and pressure situations because of which it happens. The monsoon in India starts in July and ends in September.