The rainy season begins from early June. The low-pressure condition over the northern plains intensifies at this time. It attracts the trade winds from the southern hemisphere. These south-east trade winds cross the equator and blow in a south-westerly direction to enter the Indian peninsula as the south-west monsoon. These winds bring abundant moisture to the subcontinent. These winds blow at an average velocity of 30 km/h. The monsoon winds cover the country in about a month; barring the extreme north-west