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
In December, the average high-temperature marginally drops from a cool 52.7°F (11.5°C) in November to a chilly 45.5°F (7.5°C). In Nantucket, Massachusetts, in December, the average low-temperature is 38.7°F (3.7°C).Humidity
The months with the lowest humidity in Nantucket are January, November and December, with an average relative humidity of 75%.Rainfall
In December, in Nantucket, the rain falls for 13.3 days. Throughout December, 2.52" (64mm) of precipitation is accumulated. In Nantucket, during the entire year, the rain falls for 153 days and collects up to 26.61" (676mm) of precipitation.Snowfall
Months with snowfall in Nantucket, Massachusetts, are January through March, November and December. In Nantucket, during 3.3 snowfall days, 0.47" (12mm) of snow is typically accumulated. In Nantucket, during the entire year, snow falls for 17.1 days and aggregates up to 3.23" (82mm) of snow.Ocean temperature
In Nantucket, in December, the average water temperature is 46°F (7.8°C).Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.
Daylight
December has the shortest days of the year, with an average of 9h and 16min of daylight.On the first day of the month, sunrise is at 6:46 am and sunset at 4:12 pm. On the last day of December, in Nantucket, Massachusetts, sunrise is at 7:05 am and sunset at 4:20 pm EST.
Sunshine
With an average of 4.3h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January through March and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
FAQ
What is the temperature in December in Nantucket?
What are the least humid months in Nantucket?
What is the average humidity in December in Nantucket?
How many days does it rain in December in Nantucket?
How much does it snow in Nantucket in December?
What is the water temperature in December in Nantucket?
What is the month with the shortest days in Nantucket?
How many hours of daylight does Nantucket have in December?
What time are sunrise and sunset in December in Nantucket?
What is the month with the least sunshine in Nantucket?
How long on average sun shines in December in Nantucket?
When is the lowest UV index in Nantucket?
How high is the UV index in December in Nantucket?
Average temperature in December
Nantucket, MA
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is February (39.7°F).
- Average low temperature in December: 38.7°F
The month with the highest average low temperature is August (68.7°F).
The coldest month (with the lowest average low temperature) is February (32.5°F).
Average pressure in December
Nantucket, 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 (29.94"Hg).
Average wind speed in December
Nantucket, MA
- Average wind speed in December: 18.1mph
The windiest month (with the highest average wind speed) is January (18.5mph).
The calmest month (with the lowest average wind speed) is August (11.8mph).
Average humidity in December
Nantucket, MA
- Average humidity in December: 75%
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are January, November and December (75%).
Average rainfall in December
Nantucket, MA
- Average rainfall in December: 2.52"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is November (1.77").
Average rainfall days in December
Nantucket, MA
- Average rainfall days in December: 13.3 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (9.2 days).
Average snowfall in December
Nantucket, MA
- Average snowfall in December: 0.47"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Nantucket, MA
- Average snowfall days in December: 3.3 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Nantucket, MA
- Average sea temperature in December: 46°F
The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).
Average daylight in December /
Average sunshine in December
Nantucket, MA
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 4h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in December
Nantucket, MA
- Average sunshine days in December: 11.4 days
The month with the most sunshine days is August (16.5 days).
The month with the least sunshine days is January (11.3 days).
Average UV index in December
Nantucket, 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 and December (UV index 2).
Average cloud cover in December
Nantucket, MA
- Average cloud cover in December: 54
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Nantucket, 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).
Weather forecast for your location
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location
