It was a cold day in the national capital on Friday with the mercury dropping to 18.6 degrees Celsius, four notches below normal. "The minimum temperature settled at 10 degrees Celsius, a notch above normal, while the maximum temperature settled at 18.6 degrees Celsius, four notches below normal," a MeT official said. Humidity levels oscillated between 100 and 77 per cent. The weatherman has predicted dense fog for Saturday morning with the possibility of maximum and minimum temperatures settling around 19 and 8 degrees Celsius. On Thursday, the maximum and minimum temperatures were recorded at 19 and 8 degrees Celsius. PTI