December weather forecast
Barnum Island, NY

Weather in December

December, the first month of the winter in Barnum Island, is also a frosty month, with an average temperature ranging between min 36.7°F (2.6°C) and max 43.7°F (6.5°C).

Temperature

In Barnum Island, the average high-temperature in December marginally drops from a cool 51.6°F (10.9°C) in November to a chilly 43.7°F (6.5°C). In Barnum Island, the average low-temperature is 36.7°F (2.6°C).

Humidity

In Barnum Island, the average relative humidity in December is 74%.

Rainfall

In December, in Barnum Island, the rain falls for 11.5 days. Throughout December, 3.74" (95mm) of precipitation is accumulated. Throughout the year, in Barnum Island, New York, there are 159.2 rainfall days, and 37.17" (944mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Barnum Island are January through April, October through December. In Barnum Island, during December, snow falls for 2.1 days and regularly aggregates up to 0.98" (25mm) of snow. Throughout the year, there are 15.3 snowfall days, and 5.04" (128mm) of snow is accumulated.

Ocean temperature

In Barnum Island, the average seawater temperature in December is 48°F (8.9°C).
Note: Swimming in 48°F (8.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The month with the shortest days is December, with an average of 9h and 20min of daylight.
On the first day of the month, sunrise is at 6:58 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:37 pm EST.

Sunshine

In Barnum Island, the average sunshine in December is 4.9h.

UV index

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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 snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Barnum Island?

The average high-temperature, in December, is 43.7°F (6.5°C), while the average low-temperature is 36.7°F (2.6°C).

What is the average humidity in December in Barnum Island?

In December, the average relative humidity in Barnum Island is 74%.

How many days does it rain in December in Barnum Island?

In Barnum Island, New York, in December, during 11.5 rainfall days, 3.74" (95mm) of precipitation is typically accumulated.

How much does it snow in Barnum Island in December?

In Barnum Island, New York, during December, snow falls for 2.1 days and regularly aggregates up to 0.98" (25mm) of snow.

How cold is the water in December in Barnum Island?

In December, the average ocean temperature is 48°F (8.9°C). Swimming in 48°F (8.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Barnum Island?

The month with the shortest days is December, with an average of 9h and 20min of daylight.

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

In Barnum Island, New York, the average day length in December is 9h and 20min.

When are sunrise and sunset in December in Barnum Island?

On the first day of December in Barnum Island, New York, sunrise is at 6:58 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:37 pm EST.

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

In December, the average sunshine duration in Barnum Island is 4.9h.

When is the lowest UV index in Barnum Island?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Barnum Island, New York.

How high is the UV index in December in Barnum Island?

In December, the average daily maximum UV index in Barnum Island is 2. A UV Index of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Barnum Island, NY

Average temperature in December - Barnum Island, NY
  • Average high temperature in December: 43.7°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 December: 36.7°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 December
Barnum Island, NY

Average pressure in December - Barnum Island, NY
  • Average pressure in December: 30.07"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 December
Barnum Island, NY

Average wind speed in December - Barnum Island, NY
  • Average wind speed in December: 13.1mph

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 December
Barnum Island, NY

Average humidity in December - Barnum Island, NY
  • Average humidity in December: 74%

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 December
Barnum Island, NY

Average rainfall in December - Barnum Island, NY
  • Average rainfall in December: 3.74"

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 December
Barnum Island, NY

Average rainfall days in December - Barnum Island, NY
  • Average rainfall days in December: 11.5 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 December
Barnum Island, NY

Average snowfall in December - Barnum Island, NY
  • Average snowfall in December: 0.98"

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 December
Barnum Island, NY

Average snowfall days in December - Barnum Island, NY
  • Average snowfall days in December: 2.1 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 December
Barnum Island, NY

Average sea temperature in December - Barnum Island, NY
  • Average sea temperature in December: 48.1°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 December /
Average sunshine in December
Barnum Island, NY

Average daylight in December / Average sunshine in December - Barnum Island, NY
  • Average daylight in December: 9h and 20min

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 December: 4h and 54min

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 December
Barnum Island, NY

Average sunshine days in December - Barnum Island, NY
  • Average sunshine days in December: 16.6 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 December
Barnum Island, NY

Average UV index in December - Barnum Island, NY
  • Average UV index in December: 2

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 December
Barnum Island, NY

Average cloud cover in December - Barnum Island, NY
  • Average cloud cover in December: 48

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 December
Barnum Island, NY

Average visibility in December - Barnum Island, NY
  • Average visibility in December: 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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