Westhampton Beach
New York, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Westhampton Beach, NY

The first month of the autumn, September, is still a pleasant month in Westhampton Beach, New York, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 71.1°F (21.7°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 76.5°F (24.7°C) in August, to an agreeable 71.1°F (21.7°C). In Westhampton Beach, the average low-temperature is 65.5°F (18.6°C).

Humidity

In Westhampton Beach, the average relative humidity in September is 76%.

Rainfall

In Westhampton Beach, during September, the rain falls for 12.9 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Westhampton Beach, during the entire year, the rain falls for 148 days and collects up to 29.76" (756mm) of precipitation.

Snowfall

In Westhampton Beach snow does not fall in April, June through November.

Ocean temperature

In Westhampton Beach, the average seawater temperature is 69.1°F (20.6°C).
Note: Swimming in 69.1°F (20.6°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

The average length of the day in September is 12.4h.

Sunshine

In Westhampton Beach, the average sunshine is 9.1h.

UV index

In Westhampton Beach, the average daily maximum UV index in September 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 ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. 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.

What is the temperature in September in Westhampton Beach?

In Westhampton Beach, New York, in September, the average high-temperature is 71.1°F (21.7°C), and the average low-temperature is 65.5°F (18.6°C).

What is the average humidity in September in Westhampton Beach?

In Westhampton Beach, the average relative humidity in September is 76%.

How many days does it rain in September in Westhampton Beach?

In Westhampton Beach, in September, it is raining for 12.9 days, with typically 2.05" (52mm) of accumulated precipitation.

When it does not snow in Westhampton Beach?

April, June through November are months without snowfall in Westhampton Beach, New York.

What is the ocean temperature in September in Westhampton Beach?

In Westhampton Beach, New York, in September, the average water temperature is 69.1°F (20.6°C). For most, swimming in 69.1°F (20.6°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 Westhampton Beach?

The average length of the day in September is 12.4h.

How many hours of sunshine does Westhampton Beach have in September?

In Westhampton Beach, the average sunshine in September is 9.1h.

How high is the UV index in September in Westhampton Beach?

In Westhampton Beach, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in September - Westhampton Beach, NY
  • Average high temperature in September: 71.1°F

The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 65.5°F

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

Average humidity in September - Westhampton Beach, NY
  • Average humidity in September: 76%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (72%).

Average rainfall in September - Westhampton Beach, NY
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is October (3.07").
The driest month (with the lowest rainfall) is January (1.89").

Average rainfall days in September - Westhampton Beach, NY
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (16 days).
The month with the lowest number of rainy days is January (7.8 days).

Average snowfall in September - Westhampton Beach, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.54").
Months with the lowest snowfall are April, June, July, August, September, October and November (0").

Average snowfall days in September - Westhampton Beach, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.9 days).
Months with the lowest number of snowfall days are June, July, August, September and October (0 days).

Average sea temperature in September - Westhampton Beach, NY
  • Average sea temperature in September: 69.1°F

The best month for swimming (with the highest average sea temperature) is August (73.7°F).
The coldest month (with the lowest average sea temperature) is February (38°F).

Average daylight in September / Average sunshine in September - Westhampton Beach, NY
  • Average daylight in September: 12.4h

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

  • Average sunshine in September: 9.1h

Months with most sunshine are July and August (Average sunshine: 10.8h).
Months with least sunshine are February and December (Average sunshine: 4.8).

Average UV index in September - Westhampton Beach, 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).