September typically marks the meteorological transition from summer to autumn in New York City. Daily average temperatures gradually decrease throughout the month, moving from the low 70s Fahrenheit (low 20s Celsius) at the beginning to the mid-60s Fahrenheit (high teens Celsius) by the end. This period is characterized by decreasing humidity and generally pleasant conditions, offering a comfortable respite from the summer heat. Rainfall is usually moderate and evenly distributed throughout the month.
Understanding the typical weather patterns of this period is beneficial for a variety of purposes. Travelers can plan their wardrobes and activities accordingly, anticipating comfortable sightseeing conditions. Residents can better prepare for the changing seasons, making appropriate arrangements for outdoor events or home maintenance. Businesses reliant on weather conditions, such as those in the tourism or agriculture sectors, can use historical data to inform operational decisions. Historical weather information allows for comparisons year over year, facilitating trend analysis and the identification of anomalies.