It was a cold day in the Capital with dense fog delaying over 13 trains and disrupting flight operations in the morning hours on 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%. The weatherman has forecast 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 a.m. to 10 a.m. due to low visibility.

The runway number 29 started operating normally post 10 a.m.

The minimum runway visibility required for take-off is 125 metres, an airport official said.

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