While flight operations were reported to be normal, 19 Delhi-bound trains were running behind schedule.
"The maximum temperature settled at 15.7 degrees Celsius, two notches below normal, while the minimum stood at 8.9 degrees Celsius, a notch above normal," a MeT official said.
Humidity levels oscillated between 97 and 80 per cent.
According to Northern Railway, 19 Delhi-bound trains including premier services like Howrah Duronto, Sealdah Duronto and Kanpur Shatabdi were running late by several hours due to bad weather condition.
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The airport authorities said that there was no cancellation or diversion of flights but one flight was delayed for a short while due to fog.
The weatherman has predicted dense fog tomorrow morning.
Yesterday, the maximum temperature was recorded at 19 degrees Celsius while the mercury had dipped to a low of 6 degrees Celsius.