September weather forecast
Brightwaters, NY

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Weather in September

The first month of the autumn, September, is also an agreeable month in Brightwaters, New York, with an average temperature fluctuating between 72.1°F (22.3°C) and 65.3°F (18.5°C).

Temperature

A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a warm 78.4°F (25.8°C) to an agreeable 72.1°F (22.3°C). A slight dip in temperature to an enjoyable 65.3°F (18.5°C) marks the average nights during September.

Humidity

In Brightwaters, the average relative humidity in September is 74%.

Rainfall

In Brightwaters, in September, it is raining for 13.5 days, with typically 2.56" (65mm) of accumulated precipitation. In Brightwaters, New York, during the entire year, the rain falls for 153.2 days and collects up to 34.45" (875mm) of precipitation.

Snowfall

April through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 6:20 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:36 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The solar radiation around mid-day is intense; avoid the Sun and stay safe. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Updated: Jun 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Brightwaters in September?

During September, Brightwaters experiences an average high-temperature of 72.1°F (22.3°C) and a low-temperature of 65.3°F (18.5°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

How much does it rain in September?

In September, the rain falls for 13.5 days. Throughout September, 2.56" (65mm) of precipitation is accumulated.

When it does not snow?

In Brightwaters, snow does not fall in April through September.

Does it snow in September?

In Brightwaters, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

In September, the average day length is 12h and 27min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:20 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm EDT.

How many hours of sunshine does Brightwaters have in September?

In Brightwaters, New York, the average sunshine duration in September is 9.1h.

What is the UV index reading in September?

In Brightwaters, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Brightwaters, NY

Average temperature in September - Brightwaters, NY
  • Average high temperature in September: 72.1°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in September: 65.3°F

The month with the highest average low temperature is August (72°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in September
Brightwaters, NY

Average pressure in September - Brightwaters, 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
Brightwaters, NY

Average wind speed in September - Brightwaters, NY
  • Average wind speed in September: 10.1mph

The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).

Average humidity in September
Brightwaters, NY

Average humidity in September - Brightwaters, NY
  • Average humidity in September: 74%

The months with the highest relative humidity are May and June (77%).
The month with the lowest relative humidity is November (71%).

Average rainfall in September
Brightwaters, NY

Average rainfall in September - Brightwaters, NY
  • Average rainfall in September: 2.56"

The wettest month (with the highest rainfall) is July (3.86").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in September
Brightwaters, NY

Average rainfall days in September - Brightwaters, NY
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.6 days).

Average snowfall in September
Brightwaters, NY

Average snowfall in September - Brightwaters, NY
  • Average snowfall in September: 0"

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

Average snowfall days in September
Brightwaters, NY

Average snowfall days in September - Brightwaters, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Brightwaters, NY

Average daylight in September / Average sunshine in September - Brightwaters, NY
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Brightwaters, NY

Average sunshine days in September - Brightwaters, NY
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.2 days).

Average UV index in September
Brightwaters, NY

Average UV index in September - Brightwaters, 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
Brightwaters, NY

Average cloud cover in September - Brightwaters, NY
  • Average cloud cover in September: 31

The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in September
Brightwaters, NY

Average visibility in September - Brightwaters, 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).

Brightwaters, New York, USA

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