December weather forecast
Marstons Mills, MA

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Weather in December

The first month of the winter, December, is still a chilly month in Marstons Mills, Massachusetts, with an average temperature varying between 35.6°F (2°C) and 43.3°F (6.3°C).

Temperature

December's arrival aligns with a minor decrease in average high-temperatures, from November's fresh 50.9°F (10.5°C) to a frosty 43.3°F (6.3°C). Marstons Mills records a slight downturn in temperature to an average of 35.6°F (2°C) during December nights.

Humidity

In December, the average relative humidity is 75%.

Rainfall

December is the month with the most rainfall in Marstons Mills. Rain falls for 12.7 days and accumulates 3.7" (94mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. In Marstons Mills, during December, snow falls for 3.5 days and regularly aggregates up to 0.91" (23mm) of snow. In Marstons Mills, during the entire year, snow falls for 21 days and aggregates up to 7.05" (179mm) of snow.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of December in Marstons Mills, sunrise is at 6:49 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:21 pm EST.

Sunshine

In December, the average sunshine in Marstons Mills 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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Updated: Feb 12, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How cold does it get in Marstons Mills in December?

In December, in Marstons Mills, the average high-temperature is 43.3°F (6.3°C), and the average low-temperature is 35.6°F (2°C).

What is the average humidity in December in Marstons Mills?

The average relative humidity in December in Marstons Mills, Massachusetts, is 75%.

What is the rainiest month in Marstons Mills?

The month with the most rainfall is December, when the rain falls for 12.7 days and typically aggregates up to 3.7" (94mm) of precipitation.

How much does it rain in Marstons Mills in December?

In December, the rain falls for 12.7 days. Throughout December, 3.7" (94mm) of precipitation is accumulated.

How many days does it snow in December in Marstons Mills?

In Marstons Mills, Massachusetts, during December, snow falls for 3.5 days and regularly aggregates up to 0.91" (23mm) of snow.

What is the month with the shortest days in Marstons Mills?

With an average of 9h and 12min of daylight, December has the shortest days of the year in Marstons Mills.

What is the average length of the day in December in Marstons Mills?

In Marstons Mills, Massachusetts, the average day length in December is 9h and 13min.

When is the sunrise / sunset in December in Marstons Mills?

On the first day of December in Marstons Mills, Massachusetts, sunrise is at 6:49 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:21 pm EST.

How long on average sun shines in December in Marstons Mills?

The average sunshine duration in December is 4.7h.

What are the months with the lowest UV index in Marstons Mills?

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

What is the UV index reading in December in Marstons Mills?

In December, the average daily maximum UV index in Marstons Mills, Massachusetts, is 2. A UV Index value of 2, and less, symbolizes a low health risk from 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
Marstons Mills, MA

Average temperature in December - Marstons Mills, MA
  • Average high temperature in December: 43.3°F

The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in December: 35.6°F

The month with the highest average low temperature is August (68.4°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

Average pressure in December
Marstons Mills, MA

Average pressure in December - Marstons Mills, 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).

Average wind speed in December
Marstons Mills, MA

Average wind speed in December - Marstons Mills, MA
  • Average wind speed in December: 14.9mph

The windiest month (with the highest average wind speed) is January (15.3mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).

Average humidity in December
Marstons Mills, MA

Average humidity in December - Marstons Mills, MA
  • Average humidity in December: 75%

The months with the highest relative humidity are May, June and July (82%).
The month with the lowest relative humidity is November (74%).

Average rainfall in December
Marstons Mills, MA

Average rainfall in December - Marstons Mills, MA
  • Average rainfall in December: 3.7"

The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in December
Marstons Mills, MA

Average rainfall days in December - Marstons Mills, MA
  • Average rainfall days in December: 12.7 days

The month with the highest number of rainy days is April (15.6 days).
The month with the least rainy days is January (9.3 days).

Average snowfall in December
Marstons Mills, MA

Average snowfall in December - Marstons Mills, MA
  • Average snowfall in December: 0.91"

The month with the highest snowfall is March (2.36").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Marstons Mills, MA

Average snowfall days in December - Marstons Mills, MA
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Marstons Mills, MA

Average daylight in December / Average sunshine in December - Marstons Mills, 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 month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in December
Marstons Mills, MA

Average sunshine days in December - Marstons Mills, MA
  • Average sunshine days in December: 15.1 days

The month with the most sunshine days is September (16.7 days).
The month with the least sunshine days is April (13 days).

Average UV index in December
Marstons Mills, MA

Average UV index in December - Marstons Mills, 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).

Average cloud cover in December
Marstons Mills, MA

Average cloud cover in December - Marstons Mills, MA
  • Average cloud cover in December: 50

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

Average visibility in December
Marstons Mills, MA

Average visibility in December - Marstons Mills, 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).

Marstons Mills, Massachusetts, USA

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