New York City weather in September
New York City in September averages 21°C (69°F) and 97 mm of rain.
Of the twelve months in New York City, September is the fourth warmest and the fifth driest.
- Average temp
- 21°C (69°F)
16–26°C · 61–78°F
- Rainfall
- 97 mm
Showers likely
- Sunshine
- —
- Wind
- 14 km/h
What is New York City like in September?
Daytime
Days are warm, typically in the mid-20s°C or above.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for New York City in September?
A light rain jacket
About 97 mm falls this month — showers rather than washouts.
A layer for the evening
Evenings cool off noticeably once the sun is down.
September compared with August and October
September in New York City is 4°C cooler than August and about as wet as it, which averages 25°C (77°F).
September in New York City is 6.4°C warmer than October and about as wet as it, which averages 14°C (58°F).
Daylight in New York City in September
On 15 September the sun is up for 12 hours 27 minutes in New York City, rising about 06:37 and setting about 19:04 local time.
September ends 1 hour 17 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 2 hours 38 minutes short of June, the longest-lit month here.
Where to stay in New York City
Dates are a starting point for September.
Travel guides for New York City
What to read before you book.
New York City weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 1°C / 33°F | 88 mm |
| February | 2°C / 35°F | 76 mm |
| March | 6°C / 43°F | 105 mm |
| April | 12°C / 54°F | 98 mm |
| May | 18°C / 64°F | 101 mm |
| June | 23°C / 73°F | 110 mm |
| July | 26°C / 78°F | 119 mm |
| August | 25°C / 77°F | 105 mm |
| September | 21°C / 69°F | 97 mm |
| October | 14°C / 58°F | 96 mm |
| November | 9°C / 47°F | 85 mm |
| December | 3°C / 38°F | 105 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
This is the month you are reading. Change either side to look at another.
FAQs about New York City in September
September climate averages for New York City, 1991–2020.
New York City averages 21°C (69°F) in September, ranging from about 16°C (61°F) at night to 26°C (78°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 97 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 21°C (69°F) against 14°C (58°F) in October — 6.4°C warmer.
September is 4°C cooler than August, and about as wet.
Yes. September falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 27 minutes of daylight in mid-September, against 15 hours 5 minutes in June and 9 hours 16 minutes in December.
On 15 September, sunrise is about 06:37 and sunset about 19:04 local time. Both shift across the month — the month ends 1 hour 17 minutes shorter than it starts.
