September weather forecast
East Nassau, NY

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Weather in September

September, the first month of the autumn in East Nassau, is also an agreeable month, with an average temperature fluctuating between 71.2°F (21.8°C) and 50.9°F (10.5°C).

Temperature

September marks a gentle change in average high-temperature, declining from August's warm 78.6°F (25.9°C) to an agreeable 71.2°F (21.8°C). East Nassau's average low-temperature during September nights is observed to be a fresh 50.9°F (10.5°C).

Humidity

The average relative humidity in September is 79%.

Rainfall

In East Nassau, in September, during 10.5 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, there are 140.6 rainfall days, and 24.17" (614mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in East Nassau.

Daylight

In September, the average length of the day in East Nassau is 12h and 29min.
On the first day of the month, sunrise is at 6:19 am and sunset at 7:27 pm. On the last day of September, in East Nassau, sunrise is at 6:50 am and sunset at 6:36 pm EDT.

Sunshine

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

UV index

In September, the average daily maximum UV index in East Nassau is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 3 in September translates into these instructions:
Take necessary precautions - Defending against sun damage is advocated. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What is the average September temperature in East Nassau?

In September, the average high-temperature and low-temperature in East Nassau, New York, are 71.2°F (21.8°C) and 50.9°F (10.5°C) respectively. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in July is appraised at 86°F (30°C).

What is the average humidity in September in East Nassau?

In September, the average relative humidity in East Nassau is 79%.

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

In East Nassau, New York, during September, the rain falls for 10.5 days and regularly aggregates up to 1.69" (43mm) of precipitation.

When it does not snow in East Nassau?

June through September are months without snowfall in East Nassau, New York.

Does it snow in East Nassau in September?

In East Nassau, New York, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in East Nassau?

In September, the average day length in East Nassau, New York, is 12h and 29min.

When is the sunrise / sunset in September in East Nassau?

In September, on the first day of the month, sunrise is at 6:19 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:36 pm EDT.

How long on average sun shines in September in East Nassau?

In September, the average sunshine duration in East Nassau, New York, is 8.9h.

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

In September, the average daily maximum UV index in East Nassau, New York, is 3. A UV Index reading of 3 to 5 represents a moderate health threat 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
East Nassau, NY

Average temperature in September - East Nassau, NY
  • Average high temperature in September: 71.2°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.6°F).

  • Average low temperature in September: 50.9°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).

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Average pressure in September
East Nassau, NY

Average pressure in September - East Nassau, NY
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
East Nassau, NY

Average wind speed in September - East Nassau, NY
  • Average wind speed in September: 5.5mph

The windiest months (with the highest average wind speed) are January and February (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in September
East Nassau, NY

Average humidity in September - East Nassau, NY
  • Average humidity in September: 79%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in September
East Nassau, NY

Average rainfall in September - East Nassau, NY
  • Average rainfall in September: 1.69"

The wettest months (with the highest rainfall) are May and October (2.52").
The driest month (with the least rainfall) is January (1.5").

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Average rainfall days in September
East Nassau, NY

Average rainfall days in September - East Nassau, NY
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (6.3 days).

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Average snowfall in September
East Nassau, NY

Average snowfall in September - East Nassau, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.83").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
East Nassau, NY

Average snowfall days in September - East Nassau, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
East Nassau, NY

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

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days in September
East Nassau, NY

Average sunshine days in September - East Nassau, NY
  • Average sunshine days in September: 17 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is June (12.9 days).

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Average UV index in September
East Nassau, NY

Average UV index in September - East Nassau, NY
  • Average UV index in September: 3

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in September
East Nassau, NY

Average cloud cover in September - East Nassau, NY
  • Average cloud cover in September: 35

The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in September
East Nassau, NY

Average visibility in September - East Nassau, NY
  • Average visibility in September: 5mi

The months with the highest visibility are April, July, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, August, September and October (5mi).

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East Nassau, New York, USA

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