The weather department has forecast more rain and hailstorms later in the day.
"The sky would remain cloudy. There would be no change in the weather pattern till Wednesday. There will be rain, thunder squalls and hailstorms due to the western disturbance," an official from the India Meteorological Department (IMD) told IANS.
The maximum temperature is expected to hover around the 19 degrees Celsius mark, the official added.
The overnight rains flooded roads leading to jams in several areas. Delhi received 50mm of rainfall on Monday night, a record for the last 10 years, sources said.
"We are continuously receiving calls regarding traffic jams from various parts of the city. There was water stagnation in Laxmi Nagar and Najafgarh. There were complaints from Mehrauli-Badarpur road as well," a traffic helpline official said.
Traffic snarls were reported from several areas, Dhaula Kuan, Nehru Place, Shakti Nagar, Rohini, ISBT Kashmere Gate and Vikas Marg near ITO.
Visibility at 8.30 a.m. was 800 metres and humidity 100 percent.
Monday's maximum and minimum temperatures were three notches below average at 24.2 and 11.7 degrees Celsius, respectively.