The government said the forecast on the issue will be issued on May 15.

"Climatologically, the monsoon is expected to reach South Kerala either end of May or early days of June (by 31st May ± 4 days), the forecast for which will be issued on 15th May, 2016," Union Minister for Science & Technology and Earth Sciences Harsh Vardhan said in a reply to a question in the Lok Sabha on Wednesday.

He said the forecast for monsoon onset over Kerala has been within the forecast limits during all the 10 years (2005-2014), since issuing of operational forecast for the event started in 2005.

"It may be mentioned that the skill of IMD’s present seasonal forecasting system, for India as a whole, is better than other countries in the world. There have been model developments for better skill of prediction through the Monsoon Mission program of the Ministry of Earth Sciences (MoES)," he said.