Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset brings a negligible change in high-temperatures, falling from a warm 76.5°F (24.7°C) in August to an agreeable 71.1°F (21.7°C). Westhampton Beach's September nights witness minimal differential from the daytime temperatures, with averages of 65.5°F (18.6°C).Humidity
The average relative humidity in September in Westhampton Beach is 76%.Rainfall
In Westhampton Beach, New York, in September, it is raining for 12.9 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, in Westhampton Beach, there are 148 rainfall days, and 29.76" (756mm) of precipitation is accumulated.Snowfall
In Westhampton Beach, snow does not fall in April, June through November.Ocean temperature
In Westhampton Beach, the average seawater temperature in September is 69.1°F (20.6°C).Note: Swimming in water with a temperature of 69.1°F (20.6°C) is not a pleasurable experience for the majority. As the temperature falls below 69.8°F (21°C), it becomes increasingly hard to control one's breathing.
Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:22 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:33 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Put precautions into practice - Guidance to elude sunburn is provided. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How cold is the water in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Westhampton Beach have in September?
How high is the UV index in September?
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
The 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 pressure in September
Westhampton Beach, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Westhampton Beach, NY
- Average wind speed in September: 11.9mph
The windiest month (with the highest average wind speed) is January (15.4mph).
The calmest month (with the lowest average wind speed) is July (10.2mph).
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 least 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 least 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").
The months with the least 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).
The months with the least 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: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Westhampton Beach, NY
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (12.6 days).
Average UV index in September
Westhampton Beach, 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).
Average cloud cover in September
Westhampton Beach, NY
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Westhampton Beach, 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).
Westhampton Beach, New York, USA
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