December weather forecast
Edgartown, MA

Classy and luxurious houses right on the harbor in Edgartown, Massachusetts, with long piers onto the water
Classy and luxurious houses right on the harbor in Edgartown, Massachusetts, with long piers onto the water

Weather in December

The first month of the winter, December, is still a chilly month in Edgartown, Massachusetts, with temperature in the range of an average high of 44.4°F (6.9°C) and an average low of 36.9°F (2.7°C).

Temperature

In Edgartown, Massachusetts, the average high-temperature in December marginally drops from a fresh 52.3°F (11.3°C) in November to a chilly 44.4°F (6.9°C). In December, the average low-temperature is 36.9°F (2.7°C).

Humidity

In December, the average relative humidity in Edgartown is 75%.

Rainfall

In December, the rain falls for 11.7 days. Throughout December, 2.56" (65mm) of precipitation is accumulated. In Edgartown, during the entire year, the rain falls for 146.4 days and collects up to 25.47" (647mm) of precipitation.

Snowfall

Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 4.6 snowfall days, it receives 0.67" (17mm) of snow. In Edgartown, during the entire year, snow falls for 18.3 days and aggregates up to 3.94" (100mm) of snow.

Ocean temperature

In December, the average ocean temperature is 47.1°F (8.4°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The month with the shortest days in Edgartown is December, with an average of 9h and 14min of daylight.
On the first day of December, sunrise is at 6:48 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 4:22 pm EST.

Sunshine

In Edgartown, the average sunshine in December is 4.8h.

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 reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged 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. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Edgartown?

In Edgartown, the average relative humidity in December is 75%.

How many days does it rain in December in Edgartown?

In Edgartown, Massachusetts, during December, the rain falls for 11.7 days and regularly aggregates up to 2.56" (65mm) of precipitation.

When does it start snowing in Edgartown?

December is the first month it typically snows in Edgartown, Massachusetts. Throughout December, in the average 4.6 snowfall days, it receives 0.67" (17mm) of snow.

What is the ocean temperature in December in Edgartown?

In Edgartown, the average seawater temperature in December is 47.1°F (8.4°C). 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.

What is the month with the shortest days in Edgartown?

With an average of 9h and 14min of daylight, December has the shortest days of the year.

How many hours of daylight does Edgartown have in December?

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

What time are sunrise and sunset in December in Edgartown?

In December, on the first day of the month, sunrise is at 6:48 am and sunset at 4:13 pm. On the last day of the month, in Edgartown, sunrise is at 7:07 am and sunset at 4:22 pm EST.

How many hours of sunshine does Edgartown have in December?

In Edgartown, Massachusetts, the average sunshine duration in December is 4.8h.

When is the lowest UV index in Edgartown?

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

What is the UV index intensity in December in Edgartown?

The average daily maximum UV index in December in Edgartown, Massachusetts, is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's 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
Edgartown, MA

Average temperature in December - Edgartown, MA
  • Average high temperature in December: 44.4°F

The warmest month (with the highest average high temperature) is August (73.9°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 (69.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in December
Edgartown, MA

Average pressure in December - Edgartown, 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 (29.94"Hg).

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Average wind speed in December
Edgartown, MA

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

The windiest month (with the highest average wind speed) is January (16.2mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).

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Average humidity in December
Edgartown, MA

Average humidity in December - Edgartown, 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
Edgartown, MA

Average rainfall in December - Edgartown, MA
  • Average rainfall in December: 2.56"

The wettest month (with the highest rainfall) is October (3.07").
The driest months (with the least rainfall) are August and November (1.73").

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Average rainfall days in December
Edgartown, MA

Average rainfall days in December - Edgartown, MA
  • Average rainfall days in December: 11.7 days

The month with the highest number of rainy days is April (14.5 days).
The month with the least rainy days is February (8.6 days).

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Average snowfall in December
Edgartown, MA

Average snowfall in December - Edgartown, MA
  • Average snowfall in December: 0.67"

The month with the highest snowfall is March (1.18").
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
Edgartown, MA

Average snowfall days in December - Edgartown, MA
  • Average snowfall days in December: 4.6 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, September and October (0 days).

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Average sea temperature in December
Edgartown, MA

Average sea temperature in December - Edgartown, 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
Edgartown, MA

Average daylight in December / Average sunshine in December - Edgartown, MA
  • Average daylight in December: 9h and 14min

The month with the longest days is June (Average daylight: 15h and 7min).
The month with the shortest days is December (Average daylight: 9h and 14min).

  • Average sunshine in December: 4h and 48min

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 42min).

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Average sunshine days in December
Edgartown, MA

Average sunshine days in December - Edgartown, MA
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is April (13.5 days).

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Average UV index in December
Edgartown, MA

Average UV index in December - Edgartown, 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
Edgartown, MA

Average cloud cover in December - Edgartown, 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 27).

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Average visibility in December
Edgartown, MA

Average visibility in December - Edgartown, 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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