December weather forecast
Westminster, MA

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Weather in December

The first month of the winter, December, is also a wintry month in Westminster, Massachusetts, with an average temperature varying between 35.8°F (2.1°C) and 24.8°F (-4°C).

Temperature

In Westminster, the average high-temperature in December drops from a frosty 46.2°F (7.9°C) in November to a cold 35.8°F (2.1°C). An average low-temperature of 24.8°F (-4°C) is observed during December nights.

Humidity

The average relative humidity in December is 80%.

Rainfall

In Westminster, in December, during 7.4 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, in Westminster, there are 119.4 rainfall days, and 12.44" (316mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Westminster are January through May, October through December. In Westminster, in December, snow falls for 6.7 days, with typically accumulated 1.65" (42mm) of snow. In Westminster, Massachusetts, during the entire year, snow falls for 41.1 days and aggregates up to 13.27" (337mm) of snow.

Daylight

The month with the shortest days in Westminster is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 6:58 am and sunset at 4:15 pm. On the last day of December, in Westminster, sunrise is at 7:17 am and sunset at 4:24 pm EST.

Sunshine

In Westminster, the average sunshine in December is 4.5h.

UV index

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 2 during December translates into the following guidance:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Updated: Feb 12, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How cold is it in Westminster in December?

December temperatures vary between a high-temperature of 35.8°F (2.1°C) and a low-temperature of 24.8°F (-4°C).

What is the average humidity in December in Westminster?

In December, the average relative humidity is 80%.

How many days does it rain in December in Westminster?

In Westminster, in December, during 7.4 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.

How many days does it snow in December in Westminster?

In Westminster, in December, snow falls for 6.7 days, with typically accumulated 1.65" (42mm) of snow.

What is the month with the shortest days in Westminster?

The month with the shortest days is December, with an average of 9h and 6min of daylight.

How many hours of daylight does Westminster have in December?

The average day length in December in Westminster is 9h and 7min.

When are sunrise and sunset in December in Westminster?

In December, on the first day of the month, sunrise is at 6:58 am and sunset at 4:15 pm. On the last day of the month, in Westminster, sunrise is at 7:17 am and sunset at 4:24 pm EST.

How many hours of sunshine does Westminster have in December?

In Westminster, the average sunshine duration in December is 4.5h.

What is the month with the lowest UV index in Westminster?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Westminster, Massachusetts.

What is the UV index intensity in December in Westminster?

In December, the average daily maximum UV index in Westminster, Massachusetts, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Westminster, MA

Average temperature in December - Westminster, MA
  • Average high temperature in December: 35.8°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in December: 24.8°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).

Average pressure in December
Westminster, MA

Average pressure in December - Westminster, MA
  • Average pressure in December: 30.04"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
Westminster, MA

Average wind speed in December - Westminster, MA
  • Average wind speed in December: 8.4mph

The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in December
Westminster, MA

Average humidity in December - Westminster, MA
  • Average humidity in December: 80%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (73%).

Average rainfall in December
Westminster, MA

Average rainfall in December - Westminster, MA
  • Average rainfall in December: 0.98"

The wettest months (with the highest rainfall) are June and July (1.3").
The driest month (with the least rainfall) is February (0.71").

Average rainfall days in December
Westminster, MA

Average rainfall days in December - Westminster, MA
  • Average rainfall days in December: 7.4 days

The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is February (4.4 days).

Average snowfall in December
Westminster, MA

Average snowfall in December - Westminster, MA
  • Average snowfall in December: 1.65"

The month with the highest snowfall is March (2.87").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Westminster, MA

Average snowfall days in December - Westminster, MA
  • Average snowfall days in December: 6.7 days

The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Westminster, MA

Average daylight in December / Average sunshine in December - Westminster, 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 3min

The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

Average sunshine days in December
Westminster, MA

Average sunshine days in December - Westminster, MA
  • Average sunshine days in December: 19.1 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is April (14.3 days).

Average UV index in December
Westminster, MA

Average UV index in December - Westminster, MA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in December
Westminster, MA

Average cloud cover in December - Westminster, MA
  • Average cloud cover in December: 51

The month with the most cloud cover is March (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 38).

Average visibility in December
Westminster, MA

Average visibility in December - Westminster, MA
  • Average visibility in December: 6mi

The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).

Westminster, Massachusetts, USA

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