Kerala to get weather inputs from private agencies during the 2021 southwest monsoon season as well Updated: Updated: The southwest monsoon season in Kerala lasts from June 1 to September 30. Share Article AAA People affect by flooding along Kerala’s Chellanam coast leaving their houses for safer places on Friday. Kerala will continue to get weather inputs from private weather agencies during the upcoming southwest monsoon season. | Photo Credit: H. Vibhu The southwest monsoon season in Kerala lasts from June 1 to September 30. Last year, terming the inputs from the India Meteorological Department (IMD) inadequate, the State government had permitted the State Emergency Operations Centre (SEOC) under the Kerala State Disaster Management Authority (KSDMA) to access inputs from private players in addition to the IMD forecasts.