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 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's arrival subtly correlates with a reduction in the average high-temperature, down from a fresh 54.1°F (12.3°C) in November to a frosty 46.4°F (8°C). During December, Boston experiences a consistent low-temperature average of 31.8°F (-0.1°C).Humidity
The months with the highest humidity are October and December, with an average relative humidity of 77%.Rainfall
In December, in Boston, the rain falls for 9.6 days. Throughout December, 2.17" (55mm) of precipitation is accumulated. Throughout the year, in Boston, there are 144.4 rainfall days, and 25.08" (637mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Boston, during December, snow falls for 2.3 days and regularly aggregates up to 1.69" (43mm) of snow. Throughout the year, in Boston, there are 15.4 snowfall days, and 9.17" (233mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December in Boston, sunrise is at 7:11 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:01 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.2h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during December leads to these advisories:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Boston?
What is the most humid month in Boston?
What is the average humidity in December in Boston?
How much does it rain in Boston in December?
How much does it snow in Boston in December?
What is the month with the shortest days in Boston?
What is the average length of the day in December in Boston?
When are sunrise and sunset in December in Boston?
What is the month with the least sunshine in Boston?
How long on average sun shines in December in Boston?
What is the month with the lowest UV index in Boston?
What is the UV index reading in December in Boston?
Average temperature in December
Boston, VA
- Average high temperature in December: 46.4°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (41.4°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Boston, VA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Boston, VA
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Boston, VA
- Average humidity in December: 77%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (72%).
Average rainfall in December
Boston, VA
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in December
Boston, VA
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is May (16.1 days).
The months with the least rainy days are January and November (8.3 days).
Average snowfall in December
Boston, VA
- Average snowfall in December: 1.69"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Boston, VA
- Average snowfall days in December: 2.3 days
The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Boston, VA
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in December
Boston, VA
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in December
Boston, VA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Boston, VA
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Boston, VA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Boston, Virginia, USA
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