December weather forecast
Saint James, MD

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Weather in December

December, the first month of the winter in Saint James, is still a cold month, with an average temperature ranging between max 42.3°F (5.7°C) and min 29.7°F (-1.3°C).

Temperature

December brings a slight decrease in the average high-temperature, shifting from a cool 51.1°F (10.6°C) in November to a cold 42.3°F (5.7°C). An average low-temperature of 29.7°F (-1.3°C) is noted during the month of December.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Saint James, during December, the rain falls for 9.6 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, there are 152.2 rainfall days, and 26.02" (661mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Saint James, during December, snow falls for 3.8 days and regularly aggregates up to 2.01" (51mm) of snow. Throughout the year, there are 20.8 snowfall days, and 12.56" (319mm) 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 7:13 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:31 am and sunset at 4:57 pm EST.

Sunshine

In Saint James, the average sunshine in December is 4.9h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Updated: Jun 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

In December, the average high-temperature and low-temperature are 42.3°F (5.7°C) and 29.7°F (-1.3°C) respectively. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in August is calculated to be 89.6°F (32°C).

What is the average humidity in December?

In Saint James, the average relative humidity in December is 78%.

How many days does it rain in December?

In Saint James, during December, the rain falls for 9.6 days and regularly aggregates up to 1.93" (49mm) of precipitation.

How much does it snow in December?

In Saint James, during December, snow falls for 3.8 days and regularly aggregates up to 2.01" (51mm) 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.

How many hours of daylight does Saint James have in December?

The average day length in December is 9h and 26min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:13 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:57 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.9h.

What is the month 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 reading in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat 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
Saint James, MD

Average temperature in December - Saint James, MD
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in December: 29.7°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in December
Saint James, MD

Average pressure in December - Saint James, 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 (29.95"Hg).

Average wind speed in December
Saint James, MD

Average wind speed in December - Saint James, MD
  • Average wind speed in December: 6.8mph

The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity in December
Saint James, MD

Average humidity in December - Saint James, MD
  • Average humidity in December: 78%

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is July (74%).

Average rainfall in December
Saint James, MD

Average rainfall in December - Saint James, MD
  • Average rainfall in December: 1.93"

The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is September (1.61").

Average rainfall days in December
Saint James, MD

Average rainfall days in December - Saint James, MD
  • Average rainfall days in December: 9.6 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (8.2 days).

Average snowfall in December
Saint James, MD

Average snowfall in December - Saint James, MD
  • Average snowfall in December: 2.01"

The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Saint James, MD

Average snowfall days in December - Saint James, MD
  • Average snowfall days in December: 3.8 days

The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Saint James, MD

Average daylight in December / Average sunshine in December - Saint James, 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 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).

Average sunshine days in December
Saint James, MD

Average sunshine days in December - Saint James, MD
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (11.7 days).

Average UV index in December
Saint James, MD

Average UV index in December - Saint James, 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
Saint James, MD

Average cloud cover in December - Saint James, MD
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Saint James, MD

Average visibility in December - Saint James, MD
  • Average visibility in December: 6mi

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

Saint James, Maryland, USA

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