September weather forecast
New York, NY

The sunset view over skyscrapers in New York City, USA
The sunset view over skyscrapers in New York City, USA

Weather in September

September, the first month of the autumn in New York, is still a warm month, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 74.8°F (23.8°C).

Temperature

In New York, the average high-temperature in September slightly decreases from 81.9°F (27.7°C) in August to a still warm 74.8°F (23.8°C). The average low-temperature, in September, is 62.2°F (16.8°C).

Humidity

The average relative humidity in September in New York is 73%.

Rainfall

In New York, in September, during 14.3 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, in New York, there are 169 rainfall days, and 36.65" (931mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Ocean temperature

In September, the average ocean temperature in New York is 70.2°F (21.2°C).
Note: For most, swimming in 70.2°F (21.2°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

The average length of the day in September in New York is 12h and 27min.
On the first day of the month, sunrise is at 6:23 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:40 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in September in New York?

In New York, New York, in September, the average high-temperature is 74.8°F (23.8°C), and the average low-temperature is 62.2°F (16.8°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, in August is estimated at 86°F (30°C).

What is the average humidity in September in New York?

In New York, New York, the average relative humidity in September is 73%.

How many days does it rain in September in New York?

In New York, in September, during 14.3 rainfall days, 2.44" (62mm) of precipitation is typically accumulated.

When it does not snow in New York?

In New York, New York, snow does not fall in May through October.

What is the ocean temperature in September in New York?

In New York, New York, the average seawater temperature in September is 70.2°F (21.2°C). For most, swimming in 70.2°F (21.2°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in September in New York?

The average day length in September in New York is 12h and 27min.

When is the sunrise / sunset in September in New York?

In September, on the first day of the month, sunrise is at 6:23 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:40 pm EDT.

How many hours of sunshine does New York have in September?

In September, the average sunshine duration in New York, New York, is 8.9h.

What is the UV index intensity in September in New York?

The average daily maximum UV index in September in New York, New York, is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
New York, NY

Average temperature in September - New York, NY
  • Average high temperature in September: 74.8°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (36.5°F).

  • Average low temperature in September: 62.2°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in September
New York, NY

Average pressure in September - New York, NY
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
New York, NY

Average wind speed in September - New York, NY
  • Average wind speed in September: 7.3mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in September
New York, NY

Average humidity in September - New York, NY
  • Average humidity in September: 73%

The months with the highest relative humidity are February and December (76%).
The month with the lowest relative humidity is August (70%).

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Average rainfall in September
New York, NY

Average rainfall in September - New York, NY
  • Average rainfall in September: 2.44"

The wettest month (with the highest rainfall) is July (4.02").
The driest month (with the least rainfall) is January (2.17").

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Average rainfall days in September
New York, NY

Average rainfall days in September - New York, NY
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in September
New York, NY

Average snowfall in September - New York, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
New York, NY

Average snowfall days in September - New York, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in September
New York, NY

Average sea temperature in September - New York, NY
  • Average sea temperature in September: 70.1°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

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Average daylight in September /
Average sunshine in September
New York, NY

Average daylight in September / Average sunshine in September - New York, NY
  • Average daylight in September: 12h and 27min

The month with the longest days is June (Average daylight: 15h and 2min).
The month with the shortest days is December (Average daylight: 9h and 19min).

  • Average sunshine in September: 8h and 54min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in September
New York, NY

Average sunshine days in September - New York, NY
  • Average sunshine days in September: 13.1 days

The month with the most sunshine days is January (17.9 days).
The month with the least sunshine days is June (9.8 days).

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Average UV index in September
New York, NY

Average UV index in September - New York, NY
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
New York, NY

Average cloud cover in September - New York, NY
  • Average cloud cover in September: 34

The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
New York, NY

Average visibility in September - New York, NY
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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