The national capital and several parts of North India received widespread rain since Wednesday,
The minimum temperature on Tuesday was recorded at 28.5 degrees, one notch above normal.
The study being carried out is based on rainfall data between 1971 and 2000.
IMD officials say deficient rainfall in June alone does not necessary indicate a bad season.
This year will be only the 12th time in last 113 years when there has been over 30% rainfall deficiency in June.
The minimum temperatures too were high on Tuesday, with Santacruz recording 29.8 degrees Celsius, almost 3.2 degrees above normal, and Colaba recording 28.4 degrees, 1.9 degrees above normal.
In April, the IMD had predicted a below normal monsoon at 95 per cent.
Monsoon normally hits Kerala on June 1 but this year, Met department had predicted that it will hit on June 5.
The arrival of monsoon for Mumbai will be considered ‘normal’ if it reaches Mumbai by June 15, added officials.
The Met Department in their forecast issued on Friday stated that minimum temperatures will remain above normal.
However, the plan was scrapped after most of the lakes supplying water to the city started to fill up.
Deshmukh said seed corporations and fertiliser companies have to be ready to meet the demand.
2% rise in April-May mean temperature; expect rain after Wednesday, says IMD.
The data, collected from the IMD, shows that when rainfall occurs, it is much heavier.
Ownership of the land and the willingness of the owner to provide land for the radar will also be ascertained by developers.