September weather forecast
Nissequogue, NY

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Weather in September

The first month of the autumn, September, is also an agreeable month in Nissequogue, New York, with an average temperature varying between 64.8°F (18.2°C) and 72.3°F (22.4°C).

Temperature

With the arrival of September, Nissequogue notices a mild change in the average high-temperature, sliding from August's moderately hot 78.6°F (25.9°C) to an agreeable 72.3°F (22.4°C). During September, Nissequogue perceives a slight decrease in temperature from daytime highs, settling at an average low of 64.8°F (18.2°C).

Humidity

In September, the average relative humidity in Nissequogue, New York, is 74%.

Rainfall

In Nissequogue, during September, the rain falls for 13.5 days and regularly aggregates up to 2.64" (67mm) of precipitation. In Nissequogue, during the entire year, the rain falls for 155.9 days and collects up to 35.94" (913mm) of precipitation.

Snowfall

In Nissequogue, snow does not fall in April through October.

Ocean temperature

In September, the average ocean temperature is 69.6°F (20.9°C).
Note: For the majority, swimming in 69.6°F (20.9°C) does not offer a pleasant experience. Below 69.8°F (21°C), the difficulty in controlling breathing escalates.

Daylight

In September, the average length of the day in Nissequogue is 12h and 27min.
On the first day of September in Nissequogue, New York, 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.

Sunshine

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

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 5 in September translates into this advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. 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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Frequently asked questions

What is the temperature in September in Nissequogue?

In September, in Nissequogue, the average high-temperature is 72.3°F (22.4°C), and the average low-temperature is 64.8°F (18.2°C).

What is the average humidity in September in Nissequogue?

The average relative humidity in September in Nissequogue, New York, is 74%.

How many days does it rain in September in Nissequogue?

In Nissequogue, New York, during September, the rain falls for 13.5 days and regularly aggregates up to 2.64" (67mm) of precipitation.

When it does not snow in Nissequogue?

In Nissequogue, snow does not fall in April through October.

What is the ocean temperature in September in Nissequogue?

In September, the average ocean temperature in Nissequogue is 69.6°F (20.9°C). Swimming in 69.6°F (20.9°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in Nissequogue?

The average day length in September in Nissequogue, New York, is 12h and 27min.

When is the sunrise / sunset in September in Nissequogue?

On the first day of September in Nissequogue, 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 Nissequogue have in September?

In September, the average sunshine duration in Nissequogue is 9.1h.

What is the UV index intensity in September in Nissequogue?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk 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
Nissequogue, NY

Average temperature in September - Nissequogue, NY
  • Average high temperature in September: 72.3°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in September: 64.8°F

The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).

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Average pressure in September
Nissequogue, NY

Average pressure in September - Nissequogue, 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).

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Average wind speed in September
Nissequogue, NY

Average wind speed in September - Nissequogue, NY
  • Average wind speed in September: 9.6mph

The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).

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Average humidity in September
Nissequogue, NY

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

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

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Average rainfall in September
Nissequogue, NY

Average rainfall in September - Nissequogue, NY
  • Average rainfall in September: 2.64"

The wettest month (with the highest rainfall) is July (3.94").
The driest month (with the least rainfall) is January (2.2").

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Average rainfall days in September
Nissequogue, NY

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

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in September
Nissequogue, NY

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

The month with the highest snowfall is March (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Nissequogue, NY

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

The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in September
Nissequogue, NY

Average sea temperature in September - Nissequogue, NY
  • Average sea temperature in September: 69.6°F

The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

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

Average daylight in September / Average sunshine in September - Nissequogue, 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 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).

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Average sunshine days in September
Nissequogue, NY

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

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (11.4 days).

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Average UV index in September
Nissequogue, NY

Average UV index in September - Nissequogue, 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
Nissequogue, NY

Average cloud cover in September - Nissequogue, NY
  • Average cloud cover in September: 32

The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in September
Nissequogue, NY

Average visibility in September - Nissequogue, 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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Nissequogue, New York, USA

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