December weather forecast
Monument Beach, MA

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December

Weather in December

December, the first month of the winter in Monument Beach, is also an icy month, with an average temperature fluctuating between 1.2°C and 5.8°C.

Temperature

The move into December indicates a slight reduction in the average high-temperature, down from November's fresh 10.5°C to an icy 5.8°C. Monument Beach's nights in December maintain a consistent average of 1.2°C, demonstrating a minimal differential from its daytime temperature.

Humidity

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

Rainfall

The month with the most rainfall is December, when the rain falls for 12.5 days and typically aggregates up to 91mm of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Monument Beach, Massachusetts, during December, snow falls for 3.5 days and regularly aggregates up to 32mm of snow. Throughout the year, there are 21.7 snowfall days, and 214mm of snow is accumulated.

Ocean temperature

In Monument Beach, the average seawater temperature in December is 8.3°C.
Note: Beware when you're in 8.3°C waters; 13°C is chilling and anything below 10°C could cause breathing hindrance and a sudden cold shock, given your physical condition.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:50 am and sunset at 4:12 pm. On the last day of December, sunrise is at 7:09 am and sunset at 4:22 pm EST.

Sunshine

The months with the least sunshine are February and December, with an average of 4.8h of sunshine.

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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?
December temperatures vary between a high-temperature of 5.8°C and a low-temperature of 1.2°C.
What is the average humidity in December?
The average relative humidity in December is 76%.
What is the wettest month in Monument Beach?
The month with the most rainfall is December, when the rain falls for 12.5 days and typically aggregates up to 91mm of precipitation.
How many days does it rain in December?
In Monument Beach, during December, the rain falls for 12.5 days and regularly aggregates up to 91mm of precipitation.
How much does it snow in December?
In Monument Beach, in December, during 3.5 snowfall days, 32mm of snow is typically accumulated.
What is the ocean temperature in December?
In December, the average ocean temperature is 8.3°C. Swimming in 8.3°C is considered dangerous. Unprotected immersion in temperatures below 10°C causes quickly maximum intensity cold shock with hyperventilation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
What is the average length of the day in December?
In December, the average day length is 9h and 13min.
When is the sunrise / sunset in December?
In December, on the first day of the month, sunrise is at 6:50 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 4:22 pm EST.
What are the months with the least sunshine?
February and December, with an average of 4.8h of sunshine, are months with the least sunshine.
How many hours of sunshine does Monument Beach have in December?
In Monument Beach, the average sunshine duration in December is 4.8h.
What are the months with the lowest UV index?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Monument Beach.
How high is the UV index in December?
The average daily maximum UV index in December in Monument Beach is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
10.5°C
5.8°C
2.7°C
Average low temperature
5.7°C
1.2°C
-2.4°C
Average pressure
1018.1mbar
1016.9mbar
1015.9mbar
Average wind speed
20.4km/h
20.9km/h
22km/h
Average max. wind speed
21.7km/h
22.3km/h
23.2km/h
Average wind speed gusts
31km/h
31.3km/h
32.7km/h
Average humidity
74%
76%
75%
Average rainfall
65mm
91mm
71mm
Average rainfall days
11.2
12.5
9
Average snowfall
16mm
32mm
40mm
Average snowfall days
1
3.5
6
Average sea temperature
11.8°C
8.3°C
5.2°C
Average daylight
9h 5min
9h 1min
9h 4min
Average sunshine
5h 2min
4h 5min
5h 1min
Average sunshine days
16.3
15.6
15.8
Average UV index
2
2
2
Average cloud cover
42%
48%
46%
Average visibility
9km
9km
9km
Average temperature in December
Monument Beach, MA
  • Average high temperature in December: 5.8°C

The warmest month (with the highest average high temperature) is July (24.2°C).
The month with the lowest average high temperature is January (2.7°C).

  • Average low temperature in December: 1.2°C

The month with the highest average low temperature is August (19.3°C).
The coldest month (with the lowest average low temperature) is January (-2.4°C).

Average pressure in December
Monument Beach, MA
  • Average pressure in December: 1016.9mbar

The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in December
Monument Beach, MA
  • Average wind speed in December: 20.9km/h

The windiest month (with the highest average wind speed) is January (22km/h).
The calmest month (with the lowest average wind speed) is August (14km/h).

Average humidity in December
Monument Beach, MA
  • Average humidity in December: 76%

The months with the highest relative humidity are June and July (81%).
The months with the lowest relative humidity are March and November (74%).

Average rainfall in December
Monument Beach, MA
  • Average rainfall in December: 91mm

The wettest month (with the highest rainfall) is December (91mm).
The driest month (with the least rainfall) is September (46mm).

Average rainfall days in December
Monument Beach, MA
  • Average rainfall days in December: 12.5 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (9 days).

Average snowfall in December
Monument Beach, MA
  • Average snowfall in December: 32mm

The months with the highest snowfall are February and March (58mm).
The months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days in December
Monument Beach, MA
  • Average snowfall days in December: 3.5 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).

Average sea temperature in December
Monument Beach, MA
  • Average sea temperature in December: 8.3°C

The best month for swimming (with the highest average sea temperature) is August (20.3°C).
The coldest month (with the lowest average sea temperature) is February (3.4°C).

Average daylight in December /
Average sunshine in December
Monument Beach, 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 months with the least sunshine are February and December (Average sunshine: 4h and 48min).

Average sunshine days in December
Monument Beach, MA
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is April (12.5 days).

Average UV index in December
Monument Beach, 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
Monument Beach, 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).

Average visibility in December
Monument Beach, MA
  • Average visibility in December: 9km

The months with the highest visibility are August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, November and December (9km).

°Celsius°Fahrenheit
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