However, flight operations were smooth.
"The minimum temperature recorded this morning was 8.6 degrees Celsius, a notch above the normal. Moderate fog was witnessed in the morning," a MeT official said.
The visibility recorded at 8.30 AM was 1500 metres while the humidity was 81 per cent, he added.
According to a Northern Railway official, operations of 103 North-bound trains were affected due to fog.
"While 93 trains were running behind their schedule, 2 were cancelled and 8 rescheduled," he said.
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The weatherman has predicted a clear sky ahead.
"The maximum is likely to settle at 21 degrees C," the official said.
Yesterday, the maximum temperature settled a notch above the season's average at 20 degrees Celsius while the minimum was recorded at 4.5 degrees Celsius, three notches below normal.