December weather forecast
South Duxbury, MA

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Weather in December

December, the first month of the winter in South Duxbury, is also an icy month, with an average temperature ranging between max 41.7°F (5.4°C) and min 32.9°F (0.5°C).

Temperature

December reveals a small adjustment in temperature, transitioning from an average high of a frosty 49.8°F (9.9°C) in November to an icy 41.7°F (5.4°C). South Duxbury's nocturnal December readings average at a still wintry 32.9°F (0.5°C), showing little variation from the daytime temperatures.

Humidity

In December, the average relative humidity in South Duxbury, Massachusetts, is 76%.

Rainfall

In South Duxbury, in December, it is raining for 8.6 days, with typically 1.14" (29mm) of accumulated precipitation. In South Duxbury, during the entire year, the rain falls for 120.2 days and collects up to 12.24" (311mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in South Duxbury. In December, in South Duxbury, it is snowing for 3.9 days. Throughout December, 0.59" (15mm) of snow is accumulated. In South Duxbury, during the entire year, snow falls for 21 days and aggregates up to 3.54" (90mm) of snow.

Ocean temperature

In December, the average ocean temperature in South Duxbury is 46.2°F (7.9°C).
Note: Swimming in 46.2°F (7.9°C) poses a severe threat. Even short exposure to 55.4°F (13°C) is chilling, and going below 50°F (10°C) can cause breathing irregularities and intense cold shock, based on one's stamina.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year in South Duxbury.
On the first day of December in South Duxbury, sunrise is at 6:51 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 4:21 pm EST.

Sunshine

The months with the least sunshine are February and December, with an average of 4.7h of sunshine.

UV index

The months with the lowest UV index in South Duxbury are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

Is it cold in South Duxbury during December?

The average high-temperature, in December, in South Duxbury, is 41.7°F (5.4°C), while the average low-temperature is 32.9°F (0.5°C).

What is the average humidity in December in South Duxbury?

The average relative humidity in December in South Duxbury, Massachusetts, is 76%.

How many days does it rain in December in South Duxbury?

In South Duxbury, Massachusetts, during December, the rain falls for 8.6 days and regularly aggregates up to 1.14" (29mm) of precipitation.

How many days does it snow in December in South Duxbury?

In South Duxbury, Massachusetts, during December, snow falls for 3.9 days and regularly aggregates up to 0.59" (15mm) of snow.

What is the water temperature in December in South Duxbury?

In December, the average ocean temperature in South Duxbury is 46.2°F (7.9°C). Swimming in 46.2°F (7.9°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 South Duxbury?

December has the shortest days of the year in South Duxbury, Massachusetts, with an average of 9h and 12min of daylight.

How many hours of daylight does South Duxbury have in December?

The average day length in December in South Duxbury, Massachusetts, is 9h and 11min.

What time are sunrise and sunset in December in South Duxbury?

On the first day of December in South Duxbury, Massachusetts, sunrise is at 6:51 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 4:21 pm EST.

What is the month with the least sunshine in South Duxbury?

The months with the least sunshine in South Duxbury, Massachusetts, are February and December, with an average of 4.7h of sunshine.

How many hours of sunshine does South Duxbury have in December?

In December, the average sunshine duration in South Duxbury is 4.7h.

What is the month with the lowest UV index in South Duxbury?

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

How high is the UV index in December in South Duxbury?

The average daily maximum UV index in December in South Duxbury is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe 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
South Duxbury, MA

Average temperature in December - South Duxbury, MA
  • Average high temperature in December: 41.7°F

The warmest months (with the highest average high temperature) are July and August (75.7°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in December: 32.9°F

The months with the highest average low temperature are July and August (65.8°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

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Average pressure in December
South Duxbury, MA

Average pressure in December - South Duxbury, 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
South Duxbury, MA

Average wind speed in December - South Duxbury, MA
  • Average wind speed in December: 12.2mph

The windiest month (with the highest average wind speed) is January (13mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).

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Average humidity in December
South Duxbury, MA

Average humidity in December - South Duxbury, MA
  • Average humidity in December: 76%

The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March and November (74%).

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Average rainfall in December
South Duxbury, MA

Average rainfall in December - South Duxbury, MA
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is February (0.75").

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Average rainfall days in December
South Duxbury, MA

Average rainfall days in December - South Duxbury, MA
  • Average rainfall days in December: 8.6 days

The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is February (6.3 days).

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Average snowfall in December
South Duxbury, MA

Average snowfall in December - South Duxbury, MA
  • Average snowfall in December: 0.59"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
South Duxbury, MA

Average snowfall days in December - South Duxbury, MA
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is January (6 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
South Duxbury, MA

Average sea temperature in December - South Duxbury, MA
  • Average sea temperature in December: 46.3°F

The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).

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Average daylight in December /
Average sunshine in December
South Duxbury, MA

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

The month with the longest days is June (Average daylight: 15h and 12min).
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 months with the least sunshine are February and December (Average sunshine: 4h and 42min).

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Average sunshine days in December
South Duxbury, MA

Average sunshine days in December - South Duxbury, MA
  • Average sunshine days in December: 18.9 days

The month with the most sunshine days is December (18.9 days).
The month with the least sunshine days is July (15.7 days).

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Average UV index in December
South Duxbury, MA

Average UV index in December - South Duxbury, 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
South Duxbury, MA

Average cloud cover in December - South Duxbury, MA
  • Average cloud cover in December: 49

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in December
South Duxbury, MA

Average visibility in December - South Duxbury, 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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South Duxbury, Massachusetts, USA

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