December weather forecastWest Millbury, MA
December
Weather in December
The first month of the winter, December, is also an icy month in West Millbury, Massachusetts, with an average temperature varying between 37.2°F (2.9°C) and 27°F (-2.8°C).Temperature
As December commences, the average high-temperature shows a reduction, transitioning from a frosty 47.3°F (8.5°C) in November to a cold 37.2°F (2.9°C). During December, the nighttime temperature averages to a subzero cold 27°F (-2.8°C).Humidity
In December, the average relative humidity is 79%.Rainfall
December is the month with the most rainfall in West Millbury. Rain falls for 10.9 days and accumulates 3.11" (79mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In West Millbury, Massachusetts, during December, snow falls for 6.1 days and regularly aggregates up to 3.39" (86mm) of snow. Throughout the year, there are 37.7 snowfall days, and 20.59" (523mm) of snow is accumulated.Daylight
December has the shortest days of the year in West Millbury, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:15 am and sunset at 4:25 pm EST.
Sunshine
In West Millbury, the average sunshine in December is 4.6h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
West Millbury, MA
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in December
West Millbury, MA
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
West Millbury, MA
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
West Millbury, MA
- Average humidity in December: 79%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
West Millbury, MA
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
West Millbury, MA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are January and February (7.8 days).
Average snowfall in December
West Millbury, MA
- Average snowfall in December: 3.39"
The months with the highest snowfall are February and March (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
West Millbury, MA
- Average snowfall days in December: 6.1 days
The month with the highest number of snowfall days is March (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
West Millbury, MA
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
West Millbury, MA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
West Millbury, MA
- Average UV index in December: 2
The months with the highest UV index are June and July (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
West Millbury, MA
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
West Millbury, MA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).
