December weather forecast
Mariners Cove, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Mariners Cove, Maryland, with an average temperature varying between 36.5°F (2.5°C) and 46°F (7.8°C).

Temperature

Mariners Cove's progression into December involves a gentle drop in the average high-temperature, from a cool 54.5°F (12.5°C) in November to a chilly 46°F (7.8°C). Throughout December, Mariners Cove records an average temperature of 36.5°F (2.5°C) at night.

Humidity

In Mariners Cove, the average relative humidity in December is 75%.

Rainfall

In Mariners Cove, in December, during 7.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Mariners Cove, during the entire year, the rain falls for 120.4 days and collects up to 10.47" (266mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Mariners Cove, during December, snow falls for 1.5 days and regularly aggregates up to 0.12" (3mm) of snow. In Mariners Cove, during the entire year, snow falls for 8.3 days and aggregates up to 1.22" (31mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:53 pm EST.

Sunshine

In Mariners Cove, the average sunshine in December is 5.2h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. To cut down UV radiation exposure by about half, sport a wide-brim hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.

Frequently asked questions

What is the average December temperature?

December temperatures vary between a high-temperature of 46°F (7.8°C) and a low-temperature of 36.5°F (2.5°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is evaluated at 89.6°F (32°C).

What is the average humidity in December?

In Mariners Cove, the average relative humidity in December is 75%.

How many days does it rain in December?

In Mariners Cove, in December, it is raining for 7.4 days, with typically 0.67" (17mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 1.5 days. Throughout December, 0.12" (3mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 30min of daylight.

How many hours of daylight does Mariners Cove have in December?

In December, the average day length is 9h and 29min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:06 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:53 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 5.2h.

When is the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
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
Mariners Cove, MD

Average temperature in December - Mariners Cove, MD
  • Average high temperature in December: 46°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in December: 36.5°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

Average pressure in December
Mariners Cove, MD

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

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Mariners Cove, MD

Average wind speed in December - Mariners Cove, MD
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in December
Mariners Cove, MD

Average humidity in December - Mariners Cove, MD
  • Average humidity in December: 75%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

Average rainfall in December
Mariners Cove, MD

Average rainfall in December - Mariners Cove, MD
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in December
Mariners Cove, MD

Average rainfall days in December - Mariners Cove, MD
  • Average rainfall days in December: 7.4 days

The months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).

Average snowfall in December
Mariners Cove, MD

Average snowfall in December - Mariners Cove, MD
  • Average snowfall in December: 0.12"

The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Mariners Cove, MD

Average snowfall days in December - Mariners Cove, MD
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (2.5 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
Mariners Cove, MD

Average daylight in December / Average sunshine in December - Mariners Cove, MD
  • Average daylight in December: 9h and 3min

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 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Mariners Cove, MD

Average sunshine days in December - Mariners Cove, MD
  • Average sunshine days in December: 21.5 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).

Average UV index in December
Mariners Cove, MD

Average UV index in December - Mariners Cove, 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 and December (UV index 2).

Average cloud cover in December
Mariners Cove, MD

Average cloud cover in December - Mariners Cove, MD
  • Average cloud cover in December: 44

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
Mariners Cove, MD

Average visibility in December - Mariners Cove, MD
  • Average visibility in December: 6mi

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

Mariners Cove, Maryland, USA

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