In new york city, on october 21 and on february 21, the intensity of sunlight and the number of daylight hours are almost identical. why, then in new york city is it usually much colder on february 21
October is right after the summer. Even though the meteorological conditions with sunlight are similar in both months, in October the ground has just been heated for several months by the summertime. There is a buildup of heat in the ground that contributes to the overall warmer temperature.
