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
A decrease in the average high-temperature is observed during December, shifting from a frosty 48.2°F (9°C) in November to a cold 37.9°F (3.3°C). During December nights, Billerica records an average temperature of 27.3°F (-2.6°C).Humidity
In Billerica, Massachusetts, the average relative humidity in December is 77%.Rainfall
The month with the most rainfall is December, when the rain falls for 10.9 days and typically aggregates up to 2.87" (73mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Billerica. In Billerica, during December, snow falls for 5.6 days and regularly aggregates up to 4.41" (112mm) of snow. In Billerica, during the entire year, snow falls for 32.6 days and aggregates up to 21.61" (549mm) of snow.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 6:55 am and sunset at 4:12 pm. On the last day of December, sunrise is at 7:14 am and sunset at 4:21 pm EST.
Sunshine
In December, the average sunshine is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Billerica. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is it in Billerica in December?
What is the average humidity in December in Billerica?
What is the wettest month in Billerica?
How many days does it rain in December in Billerica?
How much does it snow in Billerica in December?
What is the month with the shortest days in Billerica?
What is the average length of the day in December in Billerica?
When are sunrise and sunset in December in Billerica?
How many hours of sunshine does Billerica have in December?
What is the month with the lowest UV index in Billerica?
What is the UV index reading in December in Billerica?
Average temperature in December
Billerica, MA
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Billerica, MA
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Billerica, MA
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Billerica, MA
- Average humidity in December: 77%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Billerica, MA
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in December
Billerica, MA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in December
Billerica, MA
- Average snowfall in December: 4.41"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Billerica, MA
- Average snowfall days in December: 5.6 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Billerica, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Billerica, MA
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (13.6 days).
Average UV index in December
Billerica, MA
- Average UV index in December: 2
The months with the highest UV index are June, 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
Billerica, MA
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Billerica, MA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Billerica, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location
