Hello how may I help you? Can you compare LA and New York City? Certainly! And what specifically are you asking for? Compare population size. I need a moment to research the information. OK. NYC population: 8.55 million. LA population: 4 million. Can you compare the average temperature? By which month? Check for March. Temperatures for the following in March: NYC is with a high of 50 and a low of 35. LA is a high of 66 and a low of 48.