December weather forecast
Vineyard Haven, MA

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Weather in December

The first month of the winter, December, is still a chilly month in Vineyard Haven, Massachusetts, with an average temperature fluctuating between 36.9°F (2.7°C) and 44.2°F (6.8°C).

Temperature

Vineyard Haven experiences a moderate temperature shift at the start of December, with average high-temperatures adjusting a bit from a fresh 51.8°F (11°C) in November to a chilly 44.2°F (6.8°C). In Vineyard Haven, a slight decrease from the daytime peak is noted during the month of December, with an average low-temperature of 36.9°F (2.7°C).

Humidity

The average relative humidity in December in Vineyard Haven is 75%.

Rainfall

In Vineyard Haven, in December, it is raining for 7.9 days, with typically 0.71" (18mm) of accumulated precipitation. In Vineyard Haven, during the entire year, the rain falls for 89.3 days and collects up to 6.14" (156mm) of precipitation.

Snowfall

January through March and December are months with snowfall in Vineyard Haven, Massachusetts. December is the first month it typically snows in Vineyard Haven. Throughout December, in the average 4.9 snowfall days, it receives 0.2" (5mm) of snow. In Vineyard Haven, Massachusetts, during the entire year, snow falls for 19.3 days and aggregates up to 0.75" (19mm) of snow.

Ocean temperature

In Vineyard Haven, the average seawater temperature in December is 47.1°F (8.4°C).
Note: Swimming in 47.1°F (8.4°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 in Vineyard Haven is December, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:49 am and sunset at 4:13 pm. On the last day of December, in Vineyard Haven, sunrise is at 7:08 am and sunset at 4:22 pm EST.

Sunshine

The average sunshine in December is 4.7h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the UV index of 2 transforms into the following advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

Is December cold in Vineyard Haven?

The average high-temperature and low-temperature in Vineyard Haven during December are 44.2°F (6.8°C) and 36.9°F (2.7°C) respectively.

What is the average humidity in December in Vineyard Haven?

In Vineyard Haven, Massachusetts, the average relative humidity in December is 75%.

How many days does it rain in December in Vineyard Haven?

In Vineyard Haven, Massachusetts, in December, it is raining for 7.9 days, with typically 0.71" (18mm) of accumulated precipitation.

When does it start snowing in Vineyard Haven?

December is the first month it typically snows in Vineyard Haven. Throughout December, in the average 4.9 snowfall days, it receives 0.2" (5mm) of snow.

What is the ocean temperature in December in Vineyard Haven?

In December, the average ocean temperature in Vineyard Haven, Massachusetts, is 47.1°F (8.4°C). Swimming in 47.1°F (8.4°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Vineyard Haven?

December has the shortest days of the year in Vineyard Haven, with an average of 9h and 12min of daylight.

What is the average length of the day in December in Vineyard Haven?

In December, the average day length in Vineyard Haven is 9h and 14min.

When are sunrise and sunset in December in Vineyard Haven?

On the first day of December in Vineyard Haven, sunrise is at 6:49 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:22 pm EST.

How many hours of sunshine does Vineyard Haven have in December?

The average sunshine duration in December in Vineyard Haven is 4.7h.

What is the month with the lowest UV index in Vineyard Haven?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Vineyard Haven, Massachusetts.

What is the UV index reading in December in Vineyard Haven?

In December, the average daily maximum UV index in Vineyard Haven, Massachusetts, is 2. A UV Index reading of 2, and below, represents a low health threat 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 December
Vineyard Haven, MA

Average temperature in December - Vineyard Haven, MA
  • Average high temperature in December: 44.2°F

The warmest month (with the highest average high temperature) is August (73.8°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in December: 36.9°F

The month with the highest average low temperature is August (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

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Average pressure in December
Vineyard Haven, MA

Average pressure in December - Vineyard Haven, MA
  • Average pressure in December: 30.03"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Vineyard Haven, MA

Average wind speed in December - Vineyard Haven, MA
  • Average wind speed in December: 15.8mph

The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.7mph).

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Average humidity in December
Vineyard Haven, MA

Average humidity in December - Vineyard Haven, MA
  • Average humidity in December: 75%

The months with the highest relative humidity are May, June and July (83%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in December
Vineyard Haven, MA

Average rainfall in December - Vineyard Haven, MA
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is October (0.83").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days in December
Vineyard Haven, MA

Average rainfall days in December - Vineyard Haven, MA
  • Average rainfall days in December: 7.9 days

The month with the highest number of rainy days is July (9.1 days).
The months with the least rainy days are September and November (5.9 days).

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Average snowfall in December
Vineyard Haven, MA

Average snowfall in December - Vineyard Haven, MA
  • Average snowfall in December: 0.2"

The months with the highest snowfall are January and February (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Vineyard Haven, MA

Average snowfall days in December - Vineyard Haven, MA
  • Average snowfall days in December: 4.9 days

The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
Vineyard Haven, MA

Average sea temperature in December - Vineyard Haven, MA
  • Average sea temperature in December: 47.2°F

The best month for swimming (with the highest average sea temperature) is August (68.5°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).

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Average daylight in December /
Average sunshine in December
Vineyard Haven, MA

Average daylight in December / Average sunshine in December - Vineyard Haven, MA
  • Average daylight in December: 9h and 1min

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 12min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Vineyard Haven, MA

Average sunshine days in December - Vineyard Haven, MA
  • Average sunshine days in December: 19.8 days

The month with the most sunshine days is September (21.4 days).
The month with the least sunshine days is February (18.5 days).

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Average UV index in December
Vineyard Haven, MA

Average UV index in December - Vineyard Haven, MA
  • Average UV index in December: 2

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Vineyard Haven, MA

Average cloud cover in December - Vineyard Haven, MA
  • Average cloud cover in December: 50

The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in December
Vineyard Haven, MA

Average visibility in December - Vineyard Haven, MA
  • 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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Vineyard Haven, Massachusetts, USA

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