The national capital recorded a minimum temperature of 7.6 degrees Celsius on Thursday morning, the season's lowest, with a thin layer of smog affecting visibility.
The city had recorded a minimum of 7.9 degrees Celsius on Wednesday as cold winds continued to blow from hilly regions.
On Thursday, the maximum temperature is likely to settle at 24 degrees Celsius.
Weather experts said the mercury is expected to dip further.
Falling temperatures, high humidity and calm winds have led to an increase in pollution levels in the national capital and its suburbs.
The overall air quality index in the city crossed the 300 mark for the first time in 11 days, even as pollution levels at a few places shot up to 'severe' levels.
"Low temperatures and light winds have deteriorated the #Delhi AQI. #Pollutants are mixing with morning haze. Cool, heavy and light winds are not able to blow them away. Marginal relief during afternoon as temperatures will rise and winds will pick up," tweeted Mahesh Palwat of Skymet Weather, a private forecaster.
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