Last month, onion prices - an important food in Indian households - soared tenfold, contributing to a surge in food inflation that has picked up steadily since March.
"The single biggest factor for this increase in headline inflation is onions. While there is some sort of increase in other food prices as well, we don't see that to be extremely alarming," said Aastha Gudwani, India economist at BofA Global Research.
But core inflation, which excludes volatile components like food and energy, has declining, highlighting weak underlying demand.
Therefore, many economists do not expect the rise in consumer price inflation to prompt any policy move by the central bank at its next meeting, in February.