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
In December, the average high-temperature drops from a chilly 43.9°F (6.6°C) in November to a cold 34.3°F (1.3°C). The average low-temperature, in Boston, New York, is 25.7°F (-3.5°C).Humidity
In December, the average relative humidity in Boston is 87%.Rainfall
In Boston, in December, during 8.9 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, in Boston, there are 151.9 rainfall days, and 19.21" (488mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Boston. In Boston, during 14.4 snowfall days, 3.7" (94mm) of snow is typically accumulated. In Boston, during the entire year, snow falls for 71.6 days and aggregates up to 19.21" (488mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 7min of daylight.On the first day of December in Boston, sunrise is at 7:25 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:51 pm EST.
Sunshine
In December, the average sunshine in Boston is 2.6h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Boston, New York. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The average daily UV index of 1 in December transform into the following instructions:
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. 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. 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 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?
What time are sunrise and sunset in December in Boston?
How long on average sun shines in December in Boston?
When is the lowest UV index in Boston?
What is the UV index reading in December in Boston?
Average temperature in December
Boston, NY
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
Boston, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Boston, NY
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in December
Boston, NY
- Average humidity in December: 87%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is May (79%).
Average rainfall in December
Boston, NY
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in December
Boston, NY
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is October (17.2 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Boston, NY
- Average snowfall in December: 3.7"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Boston, NY
- Average snowfall days in December: 14.4 days
The month with the highest number of snowfall days is January (16.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Boston, NY
- Average daylight in December: 9h and 7min
The month with the longest days is June (Average daylight: 15h and 16min).
The month with the shortest days is December (Average daylight: 9h and 7min).
- Average sunshine in December: 2h and 36min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Boston, NY
- Average sunshine days in December: 10.1 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is January (8.6 days).
Average UV index in December
Boston, NY
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Boston, NY
- Average cloud cover in December: 74
The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Boston, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
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