In India, the dry season comes in the winter months. Then dry cold winds blow from Sibera over India toward the Indian Ocean. As air becomes warmer, it can hold more water vapor. Since the winter winds are blowing toward warmer regions, no rain occurs. After the winter winds die down, winds begin to blow from the Indian Ocean. over India. The moisture-laden air over the ocean is cooler than the intensely-heated air over the land. The cooler air is more dense and exerts more pressure than the less dense air over the land. As the air moves over the land, it is elevated and cooled and releases its moisture as rain. In India the rainy season usually lasts from June until September or October.
In winter, India lies in the northeast trade wind belt. These winds blow steadily from the northeast toward the equator. In summer, the southeast trade winds prevail. The southeast trade winds (normally below the equator) shift northward in summer. Both these winds blow steadily for many months to produce the prolonged wet and dry seasons.
