Weather in New York City in September
September in New York City is mild with average temperatures around 20.6°C (69.1°F). Moderate rainfall of 97mm spread over 9 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
23.2°C
73.8°F
Low
18.0°C
64.4°F
Precipitation
97 mm
3.8 inches
~9 rainy days
Conditions
Humidity
77%
Comparison to Adjacent Months
September is 3.1°C cooler than August.
September is 5.7°C warmer than October, 27mm drier than October.