The southwest monsoon arrives in India around June 1. This happens when high temperatures over the Indian landmass creates a low pressure zone. This attracts the rain bearing wind from the Indian ocean. This wind reached Kerala and the north east during the first week of June, bringing with it heavy rainfall. Over the next one and a half months, the monsoon reaches the entire country. The monsoon rains continue till the middle of September after which the phase of retreating monsoon starts.