Inflation declined to 6.38 for the week ended on Dec 20 compared to 6.62 per cent the previous week, government data showed on Thursday.
It matched a median forecast in a Reuters poll of analysts.
The annual inflation rate was 3.74 percent during the corresponding week of the previous year.
The wholesale price index is more closely watched than the consumer price index, which is published monthly, because it covers a higher number of products and is released weekly.
(Reporting by Rajkumar Ray, Editing by Mark Williams)