September weather forecast
Barnum Island, NY

Weather in September

September, the first month of the autumn in Barnum Island, is still a pleasant month, with temperature in the range of an average low of 65.3°F (18.5°C) and an average high of 72.3°F (22.4°C).

Temperature

In Barnum Island, the average high-temperature in September slightly decreases from a warm 78.4°F (25.8°C) in August to a pleasant 72.3°F (22.4°C). In September, the average low-temperature is 65.3°F (18.5°C).

Humidity

In September, the average relative humidity in Barnum Island, New York, is 75%.

Rainfall

In Barnum Island, it is raining for 13.8 days, with typically 2.68" (68mm) of accumulated precipitation. In Barnum Island, New York, during the entire year, the rain falls for 159.2 days and collects up to 37.17" (944mm) of precipitation.

Snowfall

May through September are months without snowfall.

Ocean temperature

In Barnum Island, the average seawater temperature in September is 70.2°F (21.2°C).
Note: Swimming in 70.2°F (21.2°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In Barnum Island, the average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:21 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:38 pm EDT.

Sunshine

In September, the average sunshine is 9h.

UV index

In September, the average daily maximum UV index in Barnum Island is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 5 in September transform into the following instructions:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Barnum Island?

In September, the average high-temperature is 72.3°F (22.4°C), and the average low-temperature is 65.3°F (18.5°C).

What is the average humidity in September in Barnum Island?

In Barnum Island, the average relative humidity in September is 75%.

How much does it rain in Barnum Island in September?

In September, in Barnum Island, the rain falls for 13.8 days. Throughout September, 2.68" (68mm) of precipitation is accumulated.

When it does not snow in Barnum Island?

In Barnum Island, New York, snow does not fall in May through September.

Does it snow in Barnum Island in September?

In Barnum Island, New York, in September, it doesn't snow. In October, it regularly snows.

What is the ocean temperature in September in Barnum Island?

In September, the average ocean temperature is 70.2°F (21.2°C). For most, swimming in 70.2°F (21.2°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in September in Barnum Island?

The average day length in September is 12h and 27min.

What time are sunrise and sunset in September in Barnum Island?

On the first day of September, sunrise is at 6:21 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:38 pm EDT.

How long on average sun shines in September in Barnum Island?

The average sunshine duration in September in Barnum Island is 9h.

What is the UV index intensity in September in Barnum Island?

The average daily maximum UV index in September in Barnum Island, New York, is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
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
Barnum Island, NY

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

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in September: 65.3°F

The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

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Average pressure in September
Barnum Island, NY

Average pressure in September - Barnum Island, 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
Barnum Island, NY

Average wind speed in September - Barnum Island, NY
  • Average wind speed in September: 10.2mph

The windiest month (with the highest average wind speed) is January (13.6mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

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Average humidity in September
Barnum Island, NY

Average humidity in September - Barnum Island, NY
  • Average humidity in September: 75%

The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).

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Average rainfall in September
Barnum Island, NY

Average rainfall in September - Barnum Island, NY
  • Average rainfall in September: 2.68"

The wettest month (with the highest rainfall) is July (4.17").
The driest month (with the least rainfall) is January (2.17").

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Average rainfall days in September
Barnum Island, NY

Average rainfall days in September - Barnum Island, NY
  • Average rainfall days in September: 13.8 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in September
Barnum Island, NY

Average snowfall in September - Barnum Island, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.5").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Barnum Island, NY

Average snowfall days in September - Barnum Island, NY
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (4.5 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
Barnum Island, NY

Average sea temperature in September - Barnum Island, NY
  • Average sea temperature in September: 70.1°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).

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Average daylight in September /
Average sunshine in September
Barnum Island, NY

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

The month with the longest days is June (Average daylight: 15h and 2min).
The month with the shortest days is December (Average daylight: 9h and 20min).

  • Average sunshine in September: 9h and 0min

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
Barnum Island, NY

Average sunshine days in September - Barnum Island, NY
  • Average sunshine days in September: 15 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is July (10.7 days).

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Average UV index in September
Barnum Island, NY

Average UV index in September - Barnum Island, 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
Barnum Island, NY

Average cloud cover in September - Barnum Island, 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 27).

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Average visibility in September
Barnum Island, NY

Average visibility in September - Barnum Island, 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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