September weather forecast and climate
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

September, the first month of the autumn, in East Hampton, is still a pleasant month, with temperature in the range of an average low of 65.1°F (18.4°C) and an average high of 70.3°F (21.3°C).

Temperature

In East Hampton, New York, the average high-temperature is essentially the same as in August - a pleasant 70.3°F (21.3°C). In East Hampton, the average low-temperature is 65.1°F (18.4°C).

Humidity

The average relative humidity in East Hampton is 76%.

Rainfall

September is the month with the least rainfall in East Hampton, New York. Rain falls for 12.6 days and accumulates 2.09" (53mm) of precipitation.

Snowfall

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

Ocean temperature

In East Hampton, the average water temperature is 68°F (20°C).
Note: Swimming in 68°F (20°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In September, the average length of the day is 12.4h.

Sunshine

The average sunshine is 8.9h.

UV index

In September, the average daily maximum UV index in East Hampton is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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?

In September, in East Hampton, New York, the average high-temperature is 70.3°F (21.3°C), and 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 is 76%.

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

In East Hampton, New York, during September, the rain falls for 12.6 days and regularly aggregates up to 2.09" (53mm) of precipitation.

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.

When it does not snow in East Hampton?

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

How cold is the water in September in East Hampton?

In East Hampton, in September, the average water temperature is 68°F (20°C). 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).

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

In September, the average length of the day in East Hampton, New York, is 12.4h.

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

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

How high is the UV index in September in East Hampton?

The average daily maximum UV index in September in East Hampton is 5. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.

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"

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

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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%

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

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").
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).
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: 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 August (Average sunshine: 10.6h).
The month with the least sunshine is December (Average sunshine: 4.6h).

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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).
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

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

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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