September weather forecast
East Hampton, NY

The very tall Montauk Point Lighthouse stands high on a hilly spot overlooking the rocky and pebbly shores of East Hampton in Long Island, New York
The very tall Montauk Point Lighthouse stands high on a hilly spot overlooking the rocky and pebbly shores of East Hampton in Long Island, New York

Weather in September

The first month of the autumn, September, is also an agreeable month in East Hampton, New York, with an average temperature ranging between min 65.1°F (18.4°C) and max 70.3°F (21.3°C).

Temperature

In September, the average high-temperature is almost the same as in August - an agreeable 70.3°F (21.3°C). In September, in East Hampton, the average low-temperature is 65.1°F (18.4°C).

Humidity

In East Hampton, the average relative humidity in September is 76%.

Rainfall

The month with the least rainfall in East Hampton, New York, is September, when the rain falls for 12.6 days and typically collects 2.09" (53mm) of precipitation.

Snowfall

In East Hampton, snow does not fall in June through October.

Ocean temperature

In September, the average ocean temperature is 68°F (20°C).
Note: For most, swimming in 68°F (20°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 is 12h and 28min.
On the first day of September in East Hampton, sunrise is at 6:15 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:33 pm EDT.

Sunshine

In East Hampton, the average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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.
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FAQ

What is the temperature in September in East Hampton?

The average high-temperature, in September, is 70.3°F (21.3°C), while the average low-temperature is 65.1°F (18.4°C).

What is the average humidity in September in East Hampton?

The average relative humidity in September in East Hampton, New York, is 76%.

What is the driest month in East Hampton?

The month with the least rainfall in East Hampton is September, when the rain falls for 12.6 days and typically collects 2.09" (53mm) of precipitation.

How many days does it rain in September in East Hampton?

In East Hampton, New York, in September, it is raining for 12.6 days, with typically 2.09" (53mm) of accumulated precipitation.

When it does not snow in East Hampton?

June through October are months without snowfall in East Hampton.

What is the ocean temperature in September in East Hampton?

In September, the average ocean temperature in East Hampton, New York, is 68°F (20°C). For swimming, a surface water temperature of 68°F (20°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

How many hours of daylight does East Hampton have in September?

In East Hampton, the average day length in September is 12h and 28min.

When are sunrise and sunset in September in East Hampton?

In September, on the first day of the month, sunrise is at 6:15 am and sunset at 7:22 pm. On the last day of the month, in East Hampton, New York, sunrise is at 6:44 am and sunset at 6:33 pm EDT.

How long on average sun shines in September in East Hampton?

The average sunshine duration in September is 8.9h.

What is the UV index intensity in September in East Hampton?

In September, the average daily maximum UV index in East Hampton, New York, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
East Hampton, NY

Average temperature in September - East Hampton, NY
  • Average high temperature in September: 70.3°F

The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 65.1°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.1°F).

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Average pressure in September
East Hampton, NY

Average pressure in September - East Hampton, NY
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
East Hampton, NY

Average wind speed in September - East Hampton, NY
  • Average wind speed in September: 12.7mph

The windiest month (with the highest average wind speed) is January (16.4mph).
The calmest month (with the lowest average wind speed) is July (10.8mph).

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Average humidity in September
East Hampton, NY

Average humidity in September - East Hampton, NY
  • Average humidity in September: 76%

The months with the highest relative humidity are May and June (82%).
The month with the lowest relative humidity is November (72%).

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Average rainfall in September
East Hampton, NY

Average rainfall in September - East Hampton, NY
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is December (3.54").
The driest month (with the least rainfall) is September (2.09").

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Average rainfall days in September
East Hampton, NY

Average rainfall days in September - East Hampton, NY
  • Average rainfall days in September: 12.6 days

The months with the highest number of rainy days are July and August (15.5 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
East Hampton, NY

Average snowfall in September - East Hampton, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.97").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
East Hampton, NY

Average snowfall days in September - East Hampton, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average sea temperature in September
East Hampton, NY

Average sea temperature in September - East Hampton, NY
  • Average sea temperature in September: 68°F

The best month for swimming (with the highest average sea temperature) is August (72°F).
The coldest months (with the lowest average sea temperature) are February and March (41°F).

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Average daylight in September /
Average sunshine in September
East Hampton, NY

Average daylight in September / Average sunshine in September - East Hampton, NY
  • Average daylight in September: 12h and 28min

The month with the longest days is June (Average daylight: 15h and 4min).
The month with the shortest days is December (Average daylight: 9h and 17min).

  • Average sunshine in September: 8h and 54min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

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Average sunshine days in September
East Hampton, NY

Average sunshine days in September - East Hampton, NY
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is November (18.4 days).
The months with the least sunshine days are July and August (13.3 days).

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Average UV index in September
East Hampton, NY

Average UV index in September - East Hampton, 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 and December (UV index 2).

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Average cloud cover in September
East Hampton, NY

Average cloud cover in September - East Hampton, NY
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in September
East Hampton, NY

Average visibility in September - East Hampton, 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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