December weather forecast
Oyster Harbor, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Oyster Harbor, Maryland, with temperature in the range of an average high of 46°F (7.8°C) and an average low of 36.5°F (2.5°C).

Temperature

A moderate decline in average high-temperatures is noted in December, moving from a fresh 54.5°F (12.5°C) in November to a chilly 46°F (7.8°C). Oyster Harbor cools down to an average low-temperature of 36.5°F (2.5°C) throughout the month of December.

Humidity

In December, the average relative humidity is 75%.

Rainfall

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

Snowfall

Months with snowfall are January through March, November and December. In December, it is snowing for 1.5 days. Throughout December, 0.12" (3mm) of snow is accumulated. Throughout the year, there are 8.3 snowfall days, and 1.22" (31mm) of snow is accumulated.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
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 December, the average sunshine is 5.2h.

UV index

January, February 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 unsafe exposure to UV radiation for average individuals.
Note: In December, a regular 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. The solar radiation around mid-day is intense; avoid the Sun and stay safe. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.

Frequently asked questions

What are December temperatures?

In December, in Oyster Harbor, the average high-temperature is 46°F (7.8°C), and the average low-temperature is 36.5°F (2.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in August is estimated at 89.6°F (32°C).

What is the average humidity in December?

The average relative humidity in December in Oyster Harbor, Maryland, is 75%.

How much does it rain in December?

In Oyster Harbor, in December, during 7.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Oyster Harbor, in December, snow falls for 1.5 days, with typically accumulated 0.12" (3mm) of snow.

What is the month with the shortest days in Oyster Harbor?

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

What is the average length of the day in December?

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

What time are sunrise and sunset in December?

In December, on the first day of the month, 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?

The average sunshine duration in December is 5.2h.

What are the months with the lowest UV index?

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

What is the UV index reading in December in Oyster Harbor?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Oyster Harbor, MD

Average temperature in December - Oyster Harbor, 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
Oyster Harbor, MD

Average pressure in December - Oyster Harbor, 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
Oyster Harbor, MD

Average wind speed in December - Oyster Harbor, 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
Oyster Harbor, MD

Average humidity in December - Oyster Harbor, 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
Oyster Harbor, MD

Average rainfall in December - Oyster Harbor, 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
Oyster Harbor, MD

Average rainfall days in December - Oyster Harbor, 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
Oyster Harbor, MD

Average snowfall in December - Oyster Harbor, 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
Oyster Harbor, MD

Average snowfall days in December - Oyster Harbor, 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
Oyster Harbor, MD

Average daylight in December / Average sunshine in December - Oyster Harbor, 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
Oyster Harbor, MD

Average sunshine days in December - Oyster Harbor, 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
Oyster Harbor, MD

Average UV index in December - Oyster Harbor, 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
Oyster Harbor, MD

Average cloud cover in December - Oyster Harbor, 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
Oyster Harbor, MD

Average visibility in December - Oyster Harbor, 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).

Oyster Harbor, Maryland, USA

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