Weather in New York in September 2025
- September is usually the wettest month of the year in New York;
Average weather
Average temperature in New York in September
The expected average maximum temperature in September is +25°C with a maximum of +34°C and a minimum of +12°C.
The average maximum temperature goes down 23% by the end of the month, compared with the beginning of the month, from +24°C to +19°C.
Is New York warm or cold in September?
New York is typically warm in September.
Maximum temperatures go down compared to the previous month from +28°C to +24°C. The minimum temperature also goes down from +21°C to +17°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in New York:
Water temperature in New York in September
Water in New York in September is Comfortable. It varies from +19°C to +23°C, with an average of +21°C. This is almost similar to the air temperature, which averages +24°C.
The water temperature in September is one of the warmest of the entire year:
Can you swim in New York in September?
Climate in New York in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +28°C | +24°C | +18°C | ||||
| Min. temperature | ||||||
| +10°C | +6°C | 0°C | ||||
| Max. temperature | ||||||
| +39°C | +36°C | +34°C | ||||
| Rainfall | ||||||
| 113 mm | 106 mm | 96 mm | ||||
| Wind | ||||||
| 3 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +24°C | +21°C | +17°C | ||||
| Humidity | ||||||
| 68% | 69% | 68% | ||||
| Air pressure | ||||||
| 1015 HPa | 1017 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 8 | 10 | 9 | ||||
| Cloudy days | ||||||
| 6 | 7 | 9 | ||||
| Rainy days | ||||||
| 13 | 12 | 12 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting colder in September. From +28°C in the day, the average maximum temperature lowers to +24°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 113 mm to 106 mm. Humidity rises from 68% to 69%. Winds are stronger in comparison to August, going up from 3 m/s to 4 m/s on average. The good news is there are likely to be more sunny days in September, from 8 to 10.
October brings much the same weather, it remains good.
Wind
The average wind speed is 5 m/s getting up to 10 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in New York is gradually increasing during September, going from 5 m/s to 6 m/s over the course of the month.
Rain
How was the weather last September in New York?
Climate Change over Years
The climate in New York in September has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+15°C) and the highest in 2016 (+19°C). The driest year was 1982 with only 711 mm of rainfall, and the wettest year was 2023 with 1785 mm.
FAQ
Is September a good time to visit New York?
Can you sunbathe in New York in September?
Can you swim in New York in September?
Is New York rainy in September?
Is it sunny in New York in September?
Other cities in USA
Monthly weather in New York
Source of the data
For this page, we’ve looked at the typical weather in New York, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.