The fog situation in the capital has slightly improved at noon time and runway visibility at the airport hovered around 700 metres.
"The visibility is around 700 m and even touching 750 m on some occasions, the CAT II enabled aircrafts can also fly under such conditions," airport sources said.
Trains have also been reported running late, specially those approaching the capital from northern parts of the country.
"On Tuesday, a total of around 26 trains have been reported running late due to which one train had to be rescheduled and more rescheduling is expected later in the day," railway sources said.
Trains running with major delays include, Mahananda Express, Farrakha Express, Shaheed Express and Kashi Vishwanath Express, running between 6 and 10 hours later that scheduled.
For the second day in a row fog continued to play spoilsport for passengers in the capital disrupting flights and rail traffic and leaving travelers stranded from early morning.
The minimum temperature recorded in the morning was two notches higher than the normal at 8.6 degree Celsius, yet presence of clouds failed to provide relief from the chilly climate.
The minimum temperature is expected to remain around eight and the maximum may go upto 14.6 degree Celsius, weather office said.