September weather forecast
New Suffolk, NY

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Weather in September

September, the first month of the autumn in New Suffolk, is also an agreeable month, with temperature in the range of an average low of 65.1°F (18.4°C) and an average high of 70.7°F (21.5°C).

Temperature

The advent of September denotes an average high-temperature of an agreeable 70.7°F (21.5°C), subtly different from August's 75.9°F (24.4°C). During the nights of September, New Suffolk records an average low-temperature of 65.1°F (18.4°C), reflecting a modest decrease from daytime highs.

Humidity

The average relative humidity in September is 76%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.17" (55mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:17 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:33 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 5 during September translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Jul 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

During September, New Suffolk experiences an average high-temperature of 70.7°F (21.5°C) and a low-temperature of 65.1°F (18.4°C).

What is the average humidity in September?

In New Suffolk, the average relative humidity in September is 76%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.17" (55mm) of precipitation.

How many days does it rain in September?

In New Suffolk, in September, it is raining for 12.6 days, with typically 2.17" (55mm) of accumulated precipitation.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does New Suffolk have in September?

The average day length in September is 12h and 28min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:17 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:33 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

In September, the average daily maximum UV index 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
New Suffolk, NY

Average temperature in September - New Suffolk, NY
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 65.1°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

Average pressure in September
New Suffolk, NY

Average pressure in September - New Suffolk, NY
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
New Suffolk, NY

Average wind speed in September - New Suffolk, NY
  • Average wind speed in September: 12.4mph

The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.4mph).

Average humidity in September
New Suffolk, NY

Average humidity in September - New Suffolk, NY
  • Average humidity in September: 76%

The months with the highest relative humidity are May and June (81%).
The month with the lowest relative humidity is November (72%).

Average rainfall in September
New Suffolk, NY

Average rainfall in September - New Suffolk, NY
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the least rainfall) is September (2.17").

Average rainfall days in September
New Suffolk, NY

Average rainfall days in September - New Suffolk, NY
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (9.1 days).

Average snowfall in September
New Suffolk, NY

Average snowfall in September - New Suffolk, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
New Suffolk, NY

Average snowfall days in September - New Suffolk, NY
  • Average snowfall days in September: 0 days

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

Average daylight in September /
Average sunshine in September
New Suffolk, NY

Average daylight in September / Average sunshine in September - New Suffolk, 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: 8h and 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

Average sunshine days in September
New Suffolk, NY

Average sunshine days in September - New Suffolk, NY
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is February (12.8 days).

Average UV index in September
New Suffolk, NY

Average UV index in September - New Suffolk, 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
New Suffolk, NY

Average cloud cover in September - New Suffolk, NY
  • Average cloud cover in September: 33

The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in September
New Suffolk, NY

Average visibility in September - New Suffolk, 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).

New Suffolk, New York, USA

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