Not used to such cold weather, Mumbaiikars relied on heavy woolens and most of them chose to stay indoors, leading to suburban trains running with less commuters than usual.
"The current drop in the temperature in the city can be attributed to the western disturbances which are hitting north India," said K Sathidevi, director of the Regional Meteorological Department.
Met officials said this could be the lowest temperature recorded in the city since January 27, 1962 when mercury levels dipped to 7.4 degrees.
They said a respite from the cold wave is unlikely soon with the minimum temperature on Saturday likely to be around 9 degrees.
"With north India experiencing such cold weather we are also likely to get our share of it," Sathidevi said, adding it was unusual for the city to have such a prolonged spell of cold weather.