It was a cold day in the national capital with dense fog delaying over 13 trains and disrupting flight operations in the morning hours Monday.

"The maximum temperature was recorded at 20.1 degrees Celsius, a notch above normal while the minimum settled at 7.1 degrees Celsius, normal for this time of the year," a MeT official said.

The humidity levels oscillated between 100 and 66 per cent.

The weatherman has predicted dense fog for Tuesday morning.

According to the railways, 13 trains were running late due to fog, including the Puri-New Delhi Purushottam Express (late by four hours) and the Garib Rath Express which was scheduled to arrive in Delhi three hours late.

Fog disrupted the flight operations at the Indira Gandhi International Airport as one of the runways had to be shut down from 9 am to 10 am due to low visibility.

The runway number 29 started operating normally post 10 am. The minimum runway visibility required for take-off is 125 metres, an airport official said.

On Sunday, the minimum temperature in the national capital had settled at 8.6 degrees Celsius, while the maximum temperature recorded was 19.6 degrees Celsius.

(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)