December weather forecast
Marion, MA

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Weather in December

December, the first month of the winter in Marion, is also an icy month, with temperature in the range of an average high of 42.3°F (5.7°C) and an average low of 33.6°F (0.9°C).

Temperature

A modest decline in the average high-temperature is seen during December, decreasing from a cool 50.9°F (10.5°C) in November to an icy 42.3°F (5.7°C). During December, nights in Marion cool slightly to an average low of 33.6°F (0.9°C).

Humidity

In Marion, the average relative humidity in December is 76%.

Rainfall

In Marion, Massachusetts, during December, the rain falls for 10.3 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, there are 136.3 rainfall days, and 15.63" (397mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Marion are January through May, October through December. In Marion, in December, during 3.2 snowfall days, 0.75" (19mm) of snow is typically accumulated. In Marion, during the entire year, snow falls for 21.6 days and aggregates up to 4.29" (109mm) of snow.

Ocean temperature

In December, the average ocean temperature is 46.9°F (8.3°C).
Note: Taking a dip in 46.9°F (8.3°C) can be perilous. Submersion in temperatures under 50°F (10°C) triggers severe cold shock accompanied by hyperventilation.

Daylight

December has the shortest days of the year, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:51 am and sunset at 4:13 pm. On the last day of December, sunrise is at 7:09 am and sunset at 4:22 pm EST.

Sunshine

The average sunshine in December in Marion is 4.9h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily high UV index of 2 in December leads to these guidelines:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

How cold is it in Marion in December?

In Marion, 42.3°F (5.7°C) is the average high-temperature and 33.6°F (0.9°C) is the average low-temperature during December.

What is the average humidity in December in Marion?

The average relative humidity in December in Marion is 76%.

How much does it rain in Marion in December?

In December, the rain falls for 10.3 days. Throughout December, 1.5" (38mm) of precipitation is accumulated.

How many days does it snow in December in Marion?

In December, in Marion, Massachusetts, it is snowing for 3.2 days. Throughout December, 0.75" (19mm) of snow is accumulated.

What is the water temperature in December in Marion?

In December, the average ocean temperature is 46.9°F (8.3°C). Swimming in 46.9°F (8.3°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 Marion?

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

How many hours of daylight does Marion have in December?

In Marion, the average day length in December is 9h and 13min.

When are sunrise and sunset in December in Marion?

In December, on the first day of the month, sunrise is at 6:51 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 4:22 pm EST.

How many hours of sunshine does Marion have in December?

The average sunshine duration in December in Marion, Massachusetts, is 4.9h.

When is the lowest UV index in Marion?

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

How high is the UV index in December in Marion?

The average daily maximum UV index in December in Marion, Massachusetts, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Marion, MA

Average temperature in December - Marion, MA
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in December: 33.6°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).

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Average pressure in December
Marion, MA

Average pressure in December - Marion, 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
Marion, MA

Average wind speed in December - Marion, MA
  • Average wind speed in December: 12.3mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

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Average humidity in December
Marion, MA

Average humidity in December - Marion, 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
Marion, MA

Average rainfall in December - Marion, MA
  • Average rainfall in December: 1.5"

The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is February (0.98").

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Average rainfall days in December
Marion, MA

Average rainfall days in December - Marion, MA
  • Average rainfall days in December: 10.3 days

The months with the highest number of rainy days are May and July (14.1 days).
The month with the least rainy days is February (7.7 days).

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Average snowfall in December
Marion, MA

Average snowfall in December - Marion, MA
  • Average snowfall in December: 0.75"

The month with the highest snowfall is February (1.1").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Marion, MA

Average snowfall days in December - Marion, MA
  • Average snowfall days in December: 3.2 days

The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in December
Marion, MA

Average sea temperature in December - Marion, MA
  • Average sea temperature in December: 46.9°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

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Average daylight in December /
Average sunshine in December
Marion, MA

Average daylight in December / Average sunshine in December - Marion, 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 5min

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 48min).

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Average sunshine days in December
Marion, MA

Average sunshine days in December - Marion, MA
  • Average sunshine days in December: 17.7 days

The month with the most sunshine days is December (17.7 days).
The month with the least sunshine days is April (14.3 days).

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Average UV index in December
Marion, MA

Average UV index in December - Marion, MA
  • 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, November and December (UV index 2).

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Average cloud cover in December
Marion, MA

Average cloud cover in December - Marion, MA
  • Average cloud cover in December: 48

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in December
Marion, MA

Average visibility in December - Marion, 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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Marion, Massachusetts, USA

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