The minimum temperature in the national capital rose marginally on Tuesday but remained below 10 degrees Celsius, officials said.
The city recorded a high of 24.4 degrees Celsius, which was a notch below normal, and a low of 9.1 degrees Celsius.
On Monday, the mercury had dropped to 8 degrees Celsius, the season's lowest.
Weather experts said the minimum temperature is likely to drop again to 8 degrees Celsius on Wednesday and to 7 degrees Celsius by Friday as high-velocity, cold and dry northwesterly winds continue to blow from higher hills.
The wind speed was 18-20 kmph on Tuesday and is likely to drop to 8 kmph on Wednesday, Kuldeep Srivastava, a senior scientist at the India Meteorological Department, said.
Falling temperatures and an expected dip in wind speed are likely to push the pollution levels up by Friday.
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On Tuesday, the city's air quality index read 282 at 4 pm, up from 279 at 4 pm on Monday.
The government's air quality monitor, SAFAR, said the AQI may marginally deteriorate to the lower end of the very poor category on Wednesday.
Further deterioration, to the higher-end of the very poor category, is predicted for Friday.
The farm fire count was 332 on Monday. The transport-level winds are north-westerly but the wind speed is high which is not favourable for pollutant accumulation.
There is a possibility of shallow to moderate fog on Wednesday morning.