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
The advent of December brings a subtle shift in temperature, with the average high moving from a moderate 57°F (13.9°C) in November to a frosty 48.7°F (9.3°C). December in Boston generally records an average low-temperature of 35.4°F (1.9°C).Humidity
March and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In December, the rain falls for 8.1 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. In Boston, during the entire year, the rain falls for 118.2 days and collects up to 10.83" (275mm) of precipitation.Snowfall
Months with snowfall in Boston are January through March, November and December. The months with the most snowfall in Boston are January, February and December, with an average 0.2" (5mm) of accumulated snow.Daylight
December has the shortest days of the year in Boston, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 6:40 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:44 pm CST.
Sunshine
In Boston, the average sunshine in December is 4.6h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. 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 maximum UV index of 2 transforms into these recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Boston?
What are the most humid months in Boston?
What is the average humidity in December in Boston?
How much does it rain in Boston in December?
What is the snowiest month in Boston?
How many days does it snow in December in Boston?
What is the month with the shortest days in Boston?
How many hours of daylight does Boston have in December?
When are sunrise and sunset in December in Boston?
How many hours of sunshine does Boston have in December?
When is the lowest UV index in Boston?
How high is the UV index in December in Boston?
Average temperature in December
Boston, TN
- Average high temperature in December: 48.7°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 (44.2°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in December
Boston, TN
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Boston, TN
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is February (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Boston, TN
- Average humidity in December: 79%
The months with the highest relative humidity are March and December (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Boston, TN
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is July (1.38").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in December
Boston, TN
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is November (6 days).
Average snowfall in December
Boston, TN
- Average snowfall in December: 0.2"
The months with the highest snowfall are January, February and December (0.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Boston, TN
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is February (3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Boston, TN
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Boston, TN
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in December
Boston, TN
- 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 and December (UV index 2).
Average cloud cover in December
Boston, TN
- Average cloud cover in December: 52
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Boston, TN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
Boston, Tennessee, USA
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