September weather forecast
East Williston, NY

Weather in September

September, the first month of the autumn in East Williston, is also an agreeable month, with an average temperature ranging between min 64.6°F (18.1°C) and max 72.7°F (22.6°C).

Temperature

In East Williston, New York, the average high-temperature in September marginally drops from a warm 79.5°F (26.4°C) in August to a pleasant 72.7°F (22.6°C). In East Williston, the average low-temperature is 64.6°F (18.1°C).

Humidity

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

Rainfall

In September, the rain falls for 13.4 days. Throughout September, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 158.5 rainfall days, and 36.38" (924mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In East Williston, the average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 6:21 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:39 pm EDT.

Sunshine

The average sunshine in September in East Williston is 9.1h.

UV index

In September, the average daily maximum UV index in East Williston is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. 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.
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FAQ

What is the temperature in September in East Williston?

The average high-temperature, in September, in East Williston, is 72.7°F (22.6°C), while the average low-temperature is 64.6°F (18.1°C).

What is the average humidity in September in East Williston?

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

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

In East Williston, New York, during September, the rain falls for 13.4 days and regularly aggregates up to 2.6" (66mm) of precipitation.

When it does not snow in East Williston?

In East Williston, snow does not fall in May through September.

Does it snow in East Williston in September?

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

How many hours of daylight does East Williston have in September?

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

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

In September, on the first day of the month, sunrise is at 6:21 am and sunset at 7:27 pm. On the last day of the month, in East Williston, sunrise is at 6:50 am and sunset at 6:39 pm EDT.

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

The average sunshine duration in September is 9.1h.

What is the UV index intensity in September in East Williston?

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

Average temperature in September
East Williston, NY

Average temperature in September - East Williston, NY
  • Average high temperature in September: 72.7°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (37.2°F).

  • Average low temperature in September: 64.6°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 (28.6°F).

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Average pressure in September
East Williston, NY

Average pressure in September - East Williston, NY
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
East Williston, NY

Average wind speed in September - East Williston, NY
  • Average wind speed in September: 9.2mph

The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).

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Average humidity in September
East Williston, NY

Average humidity in September - East Williston, NY
  • Average humidity in September: 74%

The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).

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Average rainfall in September
East Williston, NY

Average rainfall in September - East Williston, NY
  • Average rainfall in September: 2.6"

The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the least rainfall) is January (2.17").

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Average rainfall days in September
East Williston, NY

Average rainfall days in September - East Williston, NY
  • Average rainfall days in September: 13.4 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (8 days).

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Average snowfall in September
East Williston, NY

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

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

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Average snowfall days in September
East Williston, NY

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

The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - East Williston, NY
  • Average daylight in September: 12h and 27min

The month with the longest days is June (Average daylight: 15h and 3min).
The month with the shortest days is December (Average daylight: 9h and 19min).

  • Average sunshine in September: 9h and 6min

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
East Williston, NY

Average sunshine days in September - East Williston, NY
  • Average sunshine days in September: 15 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in September
East Williston, NY

Average UV index in September - East Williston, 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, November and December (UV index 2).

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Average cloud cover in September
East Williston, NY

Average cloud cover in September - East Williston, NY
  • Average cloud cover in September: 32

The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in September
East Williston, NY

Average visibility in September - East Williston, 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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