December weather forecast
Shady Side, MD

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Weather in December

The first month of the winter, December, is still a chilly month in Shady Side, Maryland, with an average temperature ranging between max 46.4°F (8°C) and min 36.5°F (2.5°C).

Temperature

As December begins, there is a minor decrease in the average high-temperature, softly falling from a fresh 54.5°F (12.5°C) in November to a chilly 46.4°F (8°C). Throughout December, Shady Side witnesses a nighttime temperature average of 36.5°F (2.5°C).

Humidity

The average relative humidity in December in Shady Side is 75%.

Rainfall

In Shady Side, in December, it is raining for 7.5 days, with typically 0.67" (17mm) of accumulated precipitation. In Shady Side, Maryland, during the entire year, the rain falls for 127.2 days and collects up to 11.85" (301mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Shady Side, during December, snow falls for 1.4 days and regularly aggregates up to 0.16" (4mm) of snow. Throughout the year, there are 8 snowfall days, and 1.22" (31mm) of snow is accumulated.

Ocean temperature

In Shady Side, the average seawater temperature in December is 52°F (11.1°C).
Note: Diving into 52°F (11.1°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
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 4:54 pm EST.

Sunshine

February and December, with an average of 5.2h of sunshine, are months with the least sunshine.

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 estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures?

In Shady Side, in December, the average high-temperature is 46.4°F (8°C), and the average low-temperature is 36.5°F (2.5°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 89.6°F (32°C).

What is the average humidity in December in Shady Side?

The average relative humidity in December is 75%.

How much does it rain in December?

In Shady Side, in December, during 7.5 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

How much does it snow in December?

In December, it is snowing for 1.4 days. Throughout December, 0.16" (4mm) of snow is accumulated.

What is the water temperature in December?

In Shady Side, the average seawater temperature in December is 52°F (11.1°C). Swimming in 52°F (11.1°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Shady Side have in December?

In December, the average day length is 9h and 30min.

When is the sunrise / 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 4:54 pm EST.

What are the months with the least sunshine?

The months with the least sunshine are February and December, with an average of 5.2h of sunshine.

How many hours of sunshine does Shady Side have in December?

In Shady Side, the average sunshine duration in December is 5.2h.

When is the lowest UV index?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Shady Side, Maryland.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes 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
Shady Side, MD

Average temperature in December - Shady Side, MD
  • Average high temperature in December: 46.4°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 (40.5°F).

  • Average low temperature in December: 36.5°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in December
Shady Side, MD

Average pressure in December - Shady Side, 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
Shady Side, MD

Average wind speed in December - Shady Side, MD
  • Average wind speed in December: 8.9mph

The windiest month (with the highest average wind speed) is March (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

Average humidity in December
Shady Side, MD

Average humidity in December - Shady Side, 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 and November (72%).

Average rainfall in December
Shady Side, MD

Average rainfall in December - Shady Side, MD
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.51").

Average rainfall days in December
Shady Side, MD

Average rainfall days in December - Shady Side, MD
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is August (15.6 days).
The month with the least rainy days is November (5.9 days).

Average snowfall in December
Shady Side, MD

Average snowfall in December - Shady Side, MD
  • Average snowfall in December: 0.16"

The month with the highest snowfall is January (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Shady Side, MD

Average snowfall days in December - Shady Side, MD
  • Average snowfall days in December: 1.4 days

The month with the highest number of snowfall days is January (2.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature in December
Shady Side, MD

Average sea temperature in December - Shady Side, MD
  • Average sea temperature in December: 52°F

The best month for swimming (with the highest average sea temperature) is August (78°F).
The coldest month (with the lowest average sea temperature) is February (45.9°F).

Average daylight in December /
Average sunshine in December
Shady Side, MD

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

The month with the longest days is June (Average daylight: 14h and 48min).
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 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).

Average sunshine days in December
Shady Side, MD

Average sunshine days in December - Shady Side, MD
  • Average sunshine days in December: 21 days

The month with the most sunshine days is November (22.6 days).
The month with the least sunshine days is August (12.5 days).

Average UV index in December
Shady Side, MD

Average UV index in December - Shady Side, 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
Shady Side, MD

Average cloud cover in December - Shady Side, MD
  • Average cloud cover in December: 43

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in December
Shady Side, MD

Average visibility in December - Shady Side, 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).

Shady Side, Maryland, USA

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