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Weather in New York City for September 2025

Your guide to New York City weather in September - trends and predictions
  • In general, the average temperature in New York City at the beginning of September is 29 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °F by the end of September.

  • The climate of New York City in September is notably wet, with an average of 14 rainy days.

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Average dry days
16
Dry days
Average rainy days
14
Rainy days
Average snowy days
0
Snow days
Average temperatures
25°/17°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
69 %
Avg humidity

New York City in September average weather

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Temperatures trend during September in New York City

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
27° /18° 2.7 mm 7
Sept. 2 Partly cloudy
Partly cloudy
28° /17° 0 mm 7
Sept. 3 Partly cloudy
Partly cloudy
29° /17° 0 mm 7
Sept. 4 Partly cloudy
Partly cloudy
30° /20° 0 mm 8
Sept. 5 Partly cloudy
Partly cloudy
30° /21° 0 mm 8
Sept. 6 Partly cloudy
Partly cloudy
30° /22° 0 mm 7
Sept. 7 Sunny
Sunny
29° /19° 4.7 mm 7
Sept. 8 Light rain shower
Light rain shower
26° /17° 2.1 mm 7
Sept. 9 Light rain shower
Light rain shower
28° /18° 3.4 mm 7
Sept. 10 Light rain shower
Light rain shower
27° /20° 2.5 mm 7
Sept. 11 Light rain shower
Light rain shower
28° /19° 1.2 mm 7
Sept. 12 Cloudy
Cloudy
27° /18° 0 mm 7
Sept. 13 Moderate or heavy rain shower
Moderate or heavy rain shower
26° /17° 18.2 mm 6
Sept. 14 Cloudy
Cloudy
26° /18° 0 mm 6
Sept. 15 Overcast
Overcast
24° /16° 0 mm 6
Sept. 16 Overcast
Overcast
25° /16° 0 mm 6
Sept. 17 Light drizzle
Light drizzle
23° /15° 0.6 mm 6
Sept. 18 Light rain shower
Light rain shower
21° /17° 14.1 mm 5
Sept. 19 Fog
Fog
24° /16° 7.3 mm 6
Sept. 20 Sunny
Sunny
23° /15° 1.5 mm 6
Sept. 21 Partly cloudy
Partly cloudy
25° /14° 0 mm 6
Sept. 22 Mist
Mist
22° /13° 0 mm 6
Sept. 23 Heavy rain
Heavy rain
19° /14° 23.1 mm 5
Sept. 24 Light rain
Light rain
19° /14° 3.3 mm 5
Sept. 25 Moderate rain
Moderate rain
18° /15° 35.7 mm 4
Sept. 26 Patchy rain possible
Patchy rain possible
22° /15° 23.9 mm 5
Sept. 27 Overcast
Overcast
21° /14° 8.4 mm 5
Sept. 28 Overcast
Overcast
21° /15° 0 mm 5
Sept. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
17° /15° 24.3 mm 4
Sept. 30 Light drizzle
Light drizzle
19° /14° 9 mm 4
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Important Notice
Our weather forecast for New York City in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the New York City forecast closer to your planned date for the most up-to-date weather information.

Guide for New York City in September

In September, New York City experiences a transition from the warmth of summer to the crispness of fall. At the beginning of the month, the weather in New York City is typically still quite warm, with temperatures averaging around 25° during the day and 18° at night.

The city is often still experiencing the tail end of summer, with occasional hot and humid days, perfect for enjoying outdoor activities and exploring the city's many attractions.

As the month progresses, the weather gradually cools down, and by the end of September, the temperatures in New York City have usually dropped to an average of 20° during the day and 13° at night. The humidity decreases, and there is a noticeable crispness in the air as fall sets in.

This transition makes for pleasant strolls through Central Park or along the High Line, and the city's vibrant fall foliage starts to make an appearance.

Overall, September in New York City offers a delightful mix of warm and cool weather, making it an ideal time to visit for those who enjoy the changing seasons.

New York City in September - FAQ

What are the expected maximum and minimum temperatures in New York City during September?
During September, expect a variety of temperatures with highs around 25° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in New York City during September?
Significant rainfall exceeding 253.6 mm is expected in New York City during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in New York City during September?
The average wind speed in New York City during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in New York City

Explore the daily rainfall trends and prepare for New York Citys September weather 💧

UV exposure in New York City during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is New York City?

Get accurate weather forecasts for New York City, located at latitude 40.714 and longitude -74.006. Stay updated with localized weather information tailored for New York City.

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