December weather forecast
Westminster, MD

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Weather in December

December's weather in Westminster, Maryland is truly wintry, with temperatures ranging from a high of 42.8°F (6°C) down to a low of 30.4°F (-0.9°C). The city is shrouded in a winter haze as snowfall enhances, accumulating to 1.93" (49mm). December is characterized by shorter days, specifically the shortest daylight duration of 9.4 hours. As the year comes to a close, this month provides a true winter experience in Westminster. The advent of a new year will cycle back through similar weather patterns, beginning with the cold-climate months.

Temperature

With the onset of December, Westminster experiences a modest temperature adjustment, with the average high-temperature gently receding from a cool 51.3°F (10.7°C) in November to a frosty 42.8°F (6°C). In December, the average low-temperature records at a freezing cold 30.4°F (-0.9°C) during the nights.

Humidity

The average relative humidity in December is 79%.

Rainfall

In Westminster, in December, it is raining for 11 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, there are 158.9 rainfall days, and 32.68" (830mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 3.9 days. Throughout December, 1.93" (49mm) of snow is accumulated. Throughout the year, there are 23.9 snowfall days, and 13.31" (338mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:54 pm EST.

Sunshine

The average sunshine in December is 4.9h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: An average UV index of 2 in December transforms into this advice:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

In December, in Westminster, the average high-temperature is 42.8°F (6°C), and the average low-temperature is 30.4°F (-0.9°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is appraised at 87.8°F (31°C).

What is the average humidity in December?

In Westminster, the average relative humidity in December is 79%.

How much does it rain in December?

In Westminster, in December, it is raining for 11 days, with typically 2.4" (61mm) of accumulated precipitation.

How much does it snow in December?

In Westminster, during December, snow falls for 3.9 days and regularly aggregates up to 1.93" (49mm) of snow.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 26min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:10 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:54 pm EST.

How many hours of sunshine does Westminster have in December?

In Westminster, the average sunshine duration in December is 4.9h.

What are the months with the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to 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, MD

Average temperature in December - Westminster, MD
  • Average high temperature in December: 42.8°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in December: 30.4°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

Average pressure in December
Westminster, MD

Average pressure in December - Westminster, MD
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Westminster, MD

Average wind speed in December - Westminster, MD
  • Average wind speed in December: 8.1mph

The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Westminster, MD

Average humidity in December - Westminster, MD
  • Average humidity in December: 79%

The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January, April, July and November (76%).

Average rainfall in December
Westminster, MD

Average rainfall in December - Westminster, MD
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (2.13").

Average rainfall days in December
Westminster, MD

Average rainfall days in December - Westminster, MD
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in December
Westminster, MD

Average snowfall in December - Westminster, MD
  • Average snowfall in December: 1.93"

The month with the highest snowfall is March (4.06").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Westminster, MD

Average snowfall days in December - Westminster, MD
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is January (6.9 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
Westminster, MD

Average daylight in December / Average sunshine in December - Westminster, MD
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

Average sunshine days in December
Westminster, MD

Average sunshine days in December - Westminster, MD
  • Average sunshine days in December: 17.1 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (11.6 days).

Average UV index in December
Westminster, MD

Average UV index in December - Westminster, MD
  • 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, February, November and December (UV index 2).

Average cloud cover in December
Westminster, MD

Average cloud cover in December - Westminster, MD
  • Average cloud cover in December: 48

The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Westminster, MD

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

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

Westminster, Maryland, USA

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