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
The onset of December brings a small shift in high-temperatures, falling from a frosty 48.7°F (9.3°C) in November to a cold 40.5°F (4.7°C). In Gloucester, the nighttime temperature shows a slight difference from the daytime high, averaging to 32.5°F (0.3°C) during December.Humidity
In Gloucester, Massachusetts, the average relative humidity in December is 75%.Rainfall
December is the month with the most rainfall. Rain falls for 11.4 days and accumulates 3.23" (82mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, in Gloucester, it is snowing for 4.9 days. Throughout December, 2.01" (51mm) of snow is accumulated. In Gloucester, Massachusetts, during the entire year, snow falls for 27.4 days and aggregates up to 9.17" (233mm) of snow.Ocean temperature
In Gloucester, the average seawater temperature in December is 46°F (7.8°C).Note: Swimming in 46°F (7.8°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 6min of daylight.On the first day of the month, sunrise is at 6:53 am and sunset at 4:10 pm. On the last day of December, sunrise is at 7:12 am and sunset at 4:19 pm EST.
Sunshine
February and December, with an average of 4.8h of sunshine, are months with the least sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Gloucester, Massachusetts. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the UV index of 2 transforms into the following advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
How cold is December in Gloucester?
What is the average humidity in December in Gloucester?
What is the wettest month in Gloucester?
How many days does it rain in December in Gloucester?
How many days does it snow in December in Gloucester?
What is the ocean temperature in December in Gloucester?
What is the month with the shortest days in Gloucester?
How many hours of daylight does Gloucester have in December?
What time are sunrise and sunset in December in Gloucester?
What is the month with the least sunshine in Gloucester?
How many hours of sunshine does Gloucester have in December?
What is the month with the lowest UV index in Gloucester?
How high is the UV index in December in Gloucester?
Average temperature in December
Gloucester, MA
- Average high temperature in December: 40.5°F
The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in December: 32.5°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Gloucester, 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 (29.92"Hg).
Average wind speed in December
Gloucester, MA
- Average wind speed in December: 14.4mph
The windiest month (with the highest average wind speed) is January (15.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.9mph).
Average humidity in December
Gloucester, MA
- Average humidity in December: 75%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in December
Gloucester, MA
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is December (3.23").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Gloucester, MA
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in December
Gloucester, MA
- Average snowfall in December: 2.01"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Gloucester, MA
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Gloucester, MA
- Average sea temperature in December: 45.9°F
The best month for swimming (with the highest average sea temperature) is August (66.4°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).
Average daylight in December /
Average sunshine in December
Gloucester, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Gloucester, MA
- Average sunshine days in December: 15.1 days
The months with the most sunshine days are September and November (16.7 days).
The month with the least sunshine days is February (13.1 days).
Average UV index in December
Gloucester, 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
Gloucester, MA
- Average cloud cover in December: 48
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Gloucester, 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).
Gloucester, Massachusetts, USA
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