The last three weeks have seen the highest number of fatalities, at 342.
A total of 22,186 cases have been reported across the country.
The number of deaths this year is four times more than fatalities recorded over the equivalent period in 2016, which itself saw a dip in occurrences of the disease.
The western state of Maharashtra is the worst affected, where the death toll stands at 437, according to data revealed by the Union Health Ministry. Neighbouring Gujarat follows closely with 297 deaths, reported news agency PTI.