December weather forecast
Green Island, NY

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Weather in December

December, the first month of the winter in Green Island, is also an icy month, with an average temperature varying between 34.3°F (1.3°C) and 24.3°F (-4.3°C).

Temperature

Green Island observes a minor decrease in the average high-temperature with the arrival of December, falling from November's chilly 45.5°F (7.5°C) to a cold 34.3°F (1.3°C). During the nights in December, Green Island experiences a consistent average temperature of 24.3°F (-4.3°C).

Humidity

In December, the average relative humidity is 81%.

Rainfall

In December, the rain falls for 12.1 days. Throughout December, 2.72" (69mm) of precipitation is accumulated. In Green Island, during the entire year, the rain falls for 162.8 days and collects up to 31.02" (788mm) of precipitation.

Snowfall

Months with snowfall in Green Island are January through May, October through December. In Green Island, New York, during December, snow falls for 8.6 days and regularly aggregates up to 5.55" (141mm) of snow. Throughout the year, in Green Island, there are 50.4 snowfall days, and 27.2" (691mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Green Island, with an average of 9h and 6min of daylight.
On the first day of December in Green Island, sunrise is at 7:06 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:31 pm EST.

Sunshine

The average sunshine in December in Green Island is 4.3h.

UV index

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum UV index of 2 in December translates into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Frequently asked questions

How cold is it in Green Island in December?

Green Island in December has an average high-temperature of 34.3°F (1.3°C) and an average low-temperature of 24.3°F (-4.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in July is evaluated at 86°F (30°C).

What is the average humidity in December in Green Island?

In Green Island, the average relative humidity in December is 81%.

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

In December, in Green Island, the rain falls for 12.1 days. Throughout December, 2.72" (69mm) of precipitation is accumulated.

How many days does it snow in December in Green Island?

In Green Island, New York, in December, during 8.6 snowfall days, 5.55" (141mm) of snow is typically accumulated.

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

With an average of 9h and 6min of daylight, December has the shortest days of the year in Green Island, New York.

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

In Green Island, New York, the average day length in December is 9h and 6min.

When is the sunrise / sunset in December in Green Island?

In December, on the first day of the month, sunrise is at 7:06 am and sunset at 4:21 pm. On the last day of the month, in Green Island, sunrise is at 7:25 am and sunset at 4:31 pm EST.

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

The average sunshine duration in December in Green Island, New York, is 4.3h.

When is the lowest UV index in Green Island?

The months with the lowest UV index in Green Island are January through March, October through December, with an average maximum UV index of 2.

What is the UV index intensity in December in Green Island?

In Green Island, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
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
Green Island, NY

Average temperature in December - Green Island, NY
  • Average high temperature in December: 34.3°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in December: 24.3°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

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Average pressure in December
Green Island, NY

Average pressure in December - Green Island, NY
  • Average pressure in December: 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 December
Green Island, NY

Average wind speed in December - Green Island, NY
  • Average wind speed in December: 7.6mph

The windiest months (with the highest average wind speed) are January, February and March (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in December
Green Island, NY

Average humidity in December - Green Island, NY
  • Average humidity in December: 81%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in December
Green Island, NY

Average rainfall in December - Green Island, NY
  • Average rainfall in December: 2.72"

The wettest month (with the highest rainfall) is October (3.19").
The driest month (with the least rainfall) is September (1.93").

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Average rainfall days in December
Green Island, NY

Average rainfall days in December - Green Island, NY
  • Average rainfall days in December: 12.1 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in December
Green Island, NY

Average snowfall in December - Green Island, NY
  • Average snowfall in December: 5.55"

The month with the highest snowfall is February (7.64").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Green Island, NY

Average snowfall days in December - Green Island, NY
  • Average snowfall days in December: 8.6 days

The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Green Island, NY

Average daylight in December / Average sunshine in December - Green Island, NY
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 4h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days in December
Green Island, NY

Average sunshine days in December - Green Island, NY
  • Average sunshine days in December: 14.1 days

The month with the most sunshine days is September (17.3 days).
The month with the least sunshine days is April (10.6 days).

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Average UV index in December
Green Island, NY

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

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 December
Green Island, NY

Average cloud cover in December - Green Island, NY
  • Average cloud cover in December: 54

The month with the most cloud cover is February (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 32).

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Average visibility in December
Green Island, NY

Average visibility in December - Green Island, NY
  • Average visibility in December: 6mi

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

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Green Island, New York, USA

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