High humidity level at 98 per cent contributed to the smog, the official said. The wind was calm.
The minimum temperature at 13C was a notch below the average for the season.
Light rain is expected on November 14-15 which might intensify the fog but could clear the smog, the official said.
The national capital has been experiencing dense smog for the past a few days, forcing authorities to enforce emergency measures such as banning construction activities and brick kilns due to worsening air pollution.
The "odd-even" rationing of cars, which was scheduled to begin on Monday, was however deferred by the Delhi government after the National Green Tribunal ordered the withdrawal of exemptions given to women and two-wheelers under the scheme.
The MeT department has predicted a partly cloudy sky and a maximum temperature of around 28 degrees Celsius for today.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)