Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Oak Bluffs's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's fresh 51.8°F (11°C) to a frosty 44.2°F (6.8°C). In the month of December, Oak Bluffs experiences a minor discrepancy from peak daytime temperatures, settling at an average low-temperature of 36.9°F (2.7°C).Humidity
In Oak Bluffs, the average relative humidity in December is 75%.Rainfall
In December, the rain falls for 7.9 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 89.3 rainfall days, and 6.14" (156mm) of precipitation is accumulated.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 4.9 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 19.3 snowfall days, and 0.75" (19mm) of snow is accumulated.Ocean temperature
In Oak Bluffs, the average seawater temperature in December is 47.1°F (8.4°C).Note: With an efficient thermal swimsuit, one can navigate 47.1°F (8.4°C) even if it's colder than 50°F (10°C); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 55.4°F (13°C) feels chilly.
Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:49 am and sunset at 4:13 pm. On the last day of December, sunrise is at 7:08 am and sunset at 4:22 pm EST.
Sunshine
In December, the average sunshine is 4.7h.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 value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. 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. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How many days does it rain in December?
When does it start to snow?
What is the ocean temperature in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Oak Bluffs, MA
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is August (73.8°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 (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in December
Oak Bluffs, 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
Oak Bluffs, MA
- Average wind speed in December: 15.8mph
The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.7mph).
Average humidity in December
Oak Bluffs, 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%).
Average rainfall in December
Oak Bluffs, MA
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is October (0.83").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Oak Bluffs, MA
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is July (9.1 days).
The months with the least rainy days are September and November (5.9 days).
Average snowfall in December
Oak Bluffs, MA
- Average snowfall in December: 0.2"
The months with the highest snowfall are January and February (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Oak Bluffs, MA
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Oak Bluffs, 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).
Average daylight in December /
Average sunshine in December
Oak Bluffs, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
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
Oak Bluffs, MA
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is September (21.4 days).
The month with the least sunshine days is February (18.5 days).
Average UV index in December
Oak Bluffs, 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
Oak Bluffs, 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 28).
Average visibility in December
Oak Bluffs, 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).
Oak Bluffs, Massachusetts, USA
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