September weather forecast and climate
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

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

Temperature

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

Humidity

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

Rainfall

In New York, it is raining for 14.3 days, with typically 2.44" (62mm) of accumulated precipitation. In New York, during the entire year, the rain falls for 169 days and collects up to 36.65" (931mm) of precipitation.

Snowfall

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

Ocean temperature

In New York, in September, the average water temperature 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 New York is 12.4h.

Sunshine

In New York, the average sunshine is 8.9h.

UV index

The average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for the average person.
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 strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in September in New York?

The average high-temperature, in September, in New York, New York, is 74.8°F (23.8°C), while the average low-temperature is 62.2°F (16.8°C).

What is the average humidity in September in New York?

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

How much does it rain in New York in September?

In New York, during September, the rain falls for 14.3 days and regularly aggregates up to 2.44" (62mm) of precipitation.

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 September, the average ocean temperature in New York 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 length of the day in September in New York, New York, is 12.4h.

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

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

How high is the UV index in September in New York?

The average daily maximum UV index in September in New York is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

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"

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

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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%

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").
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).
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: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.9h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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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

Months with the highest UV index are June, July and August (UV index 6).
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

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

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

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