December weather forecast
Copiague, NY

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Weather in December

The first month of the winter, December, is also a frosty month in Copiague, New York, with an average temperature ranging between min 37°F (2.8°C) and max 44.1°F (6.7°C).

Temperature

As November makes way for December, Copiague's average high-temperature eases from a cool 52.2°F (11.2°C) to a frosty 44.1°F (6.7°C). December nights in Copiague, New York, witness a mild cool down to an average low of 37°F (2.8°C).

Humidity

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

Rainfall

In Copiague, in December, it is raining for 12.6 days, with typically 3.27" (83mm) of accumulated precipitation. In Copiague, during the entire year, the rain falls for 158.8 days and collects up to 31.38" (797mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Copiague, New York. In Copiague, New York, in December, snow falls for 2.7 days, with typically accumulated 0.59" (15mm) of snow. In Copiague, during the entire year, snow falls for 16.8 days and aggregates up to 4.17" (106mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 6:58 am and sunset at 4:26 pm. On the last day of December, in Copiague, sunrise is at 7:17 am and sunset at 4:36 pm EST.

Sunshine

In December, the average sunshine in Copiague 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 in Copiague. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 2 translates into these guidelines:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

Is it cold in Copiague during December?

The high-temperature in Copiague, New York, during December is 44.1°F (6.7°C) and the low-temperature is 37°F (2.8°C).

What is the average humidity in December in Copiague?

The average relative humidity in December in Copiague is 74%.

How many days does it rain in December in Copiague?

In Copiague, in December, it is raining for 12.6 days, with typically 3.27" (83mm) of accumulated precipitation.

How many days does it snow in December in Copiague?

In Copiague, in December, snow falls for 2.7 days, with typically accumulated 0.59" (15mm) of snow.

What is the month with the shortest days in Copiague?

The month with the shortest days in Copiague, New York, is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Copiague have in December?

In Copiague, New York, the average day length in December is 9h and 19min.

When are sunrise and sunset in December in Copiague?

On the first day of December in Copiague, New York, sunrise is at 6:58 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:36 pm EST.

How many hours of sunshine does Copiague have in December?

In December, the average sunshine duration in Copiague, New York, is 4.9h.

When is the lowest UV index in Copiague?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December in Copiague?

In Copiague, New York, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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
Copiague, NY

Average temperature in December - Copiague, NY
  • Average high temperature in December: 44.1°F

The warmest months (with the highest average high temperature) are July and August (78.4°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in December: 37°F

The months with the highest average low temperature are July and August (72°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

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Average pressure in December
Copiague, NY

Average pressure in December - Copiague, 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 (29.93"Hg).

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Average wind speed in December
Copiague, NY

Average wind speed in December - Copiague, NY
  • Average wind speed in December: 13.4mph

The windiest month (with the highest average wind speed) is January (13.9mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).

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Average humidity in December
Copiague, NY

Average humidity in December - Copiague, NY
  • Average humidity in December: 74%

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

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Average rainfall in December
Copiague, NY

Average rainfall in December - Copiague, NY
  • Average rainfall in December: 3.27"

The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is January (1.89").

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Average rainfall days in December
Copiague, NY

Average rainfall days in December - Copiague, NY
  • Average rainfall days in December: 12.6 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in December
Copiague, NY

Average snowfall in December - Copiague, NY
  • Average snowfall in December: 0.59"

The month with the highest snowfall is March (1.34").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Copiague, NY

Average snowfall days in December - Copiague, NY
  • Average snowfall days in December: 2.7 days

The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Copiague, NY

Average daylight in December / Average sunshine in December - Copiague, NY
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 5min

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
Copiague, NY

Average sunshine days in December - Copiague, NY
  • Average sunshine days in December: 13.5 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (12.3 days).

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Average UV index in December
Copiague, NY

Average UV index in December - Copiague, 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
Copiague, NY

Average cloud cover in December - Copiague, 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
Copiague, NY

Average visibility in December - Copiague, 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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Copiague, New York, USA

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