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
December signifies a gentle decline in Vineyard Haven's average high-temperature, easing from a fresh 51.8°F (11°C) in November to a frosty 44.2°F (6.8°C). Vineyard Haven observes a consistent average low-temperature of 36.9°F (2.7°C) throughout December nights.Humidity
The average relative humidity in December is 75%.Rainfall
In Vineyard Haven, in December, it is raining for 7.9 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, in Vineyard Haven, there are 89.3 rainfall days, and 6.14" (156mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 4.9 snowfall days, it receives 0.2" (5mm) of snow. In Vineyard Haven, during the entire year, snow falls for 19.3 days and aggregates up to 0.75" (19mm) of snow.Ocean temperature
In Vineyard Haven, the average seawater temperature in December is 47.1°F (8.4°C).Note: Swimming in 47.1°F (8.4°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.
Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December in Vineyard Haven, sunrise is at 6:49 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 4:22 pm EST.
Sunshine
In December, the average sunshine in Vineyard Haven 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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. To cut down UV radiation exposure by about half, sport a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Vineyard Haven during December?
What is the average humidity in December?
How many days does it rain in December?
When does it start snowing?
What is the water temperature in December?
What is the month with the shortest days?
How many hours of daylight does Vineyard Haven have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index in Vineyard Haven?
How high is the UV index in December?
Average temperature in December
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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
Vineyard Haven, 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).
Vineyard Haven, Massachusetts, USA
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