December weather forecast
Shady Side, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Shady Side, Maryland, with temperature in the range of an average high of 46.4°F (8°C) and an average low of 36.5°F (2.5°C).

Temperature

Transitioning from November to December involves a subtle drop in average high-temperatures, descending from a fresh 54.5°F (12.5°C) to a chilly 46.4°F (8°C). During December nights, Shady Side records an average temperature of 36.5°F (2.5°C).

Humidity

In Shady Side, the average relative humidity in December is 75%.

Rainfall

In Shady Side, in December, it is raining for 7.5 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, there are 127.2 rainfall days, and 11.85" (301mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Shady Side are January through March, November and December. In Shady Side, in December, snow falls for 1.4 days, with typically accumulated 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, in December, the average water temperature is 52°F (11.1°C).
Note: In 52°F (11.1°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health.

Daylight

The month with the shortest days in Shady Side is December, 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 4:54 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 in Shady Side, Maryland, are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: An average UV index of 2 in December transforms into this advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

What are December temperatures in Shady Side?

The high-temperature, in December, in Shady Side, records 46.4°F (8°C), while the low-temperature is 36.5°F (2.5°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is computed to be 89.6°F (32°C).

What is the average humidity in December in Shady Side?

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

How much does it rain in Shady Side in December?

In Shady Side, Maryland, in December, it is raining for 7.5 days, with typically 0.67" (17mm) of accumulated precipitation.

How much does it snow in Shady Side in December?

In Shady Side, Maryland, in December, during 1.4 snowfall days, 0.16" (4mm) of snow is typically accumulated.

What is the ocean temperature in December in Shady Side?

In Shady Side, the average seawater temperature in December is 52°F (11.1°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the month with the shortest days in Shady Side?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Shady Side, Maryland.

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

In Shady Side, Maryland, the average day length in December is 9h and 30min.

What time are sunrise and sunset in December in Shady Side?

On the first day of December in Shady Side, Maryland, 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 is the month with the least sunshine in Shady Side?

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

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

The average sunshine duration in December in Shady Side is 5.2h.

What is the month with the lowest UV index in Shady Side?

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

What is the UV index intensity in December in Shady Side?

In December, the average daily maximum UV index in Shady Side is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
54.5°F 12.5°C
46.4°F 8°C
40.5°F 4.7°C
Average low temperature
43.2°F 6.2°C
36.5°F 2.5°C
30°F -1.1°C
Average pressure
30.13" 765mmHg
30.11" 765mmHg
30.1" 765mmHg
Average wind speed
8.9mph 14.3km/h
8.9mph 14.3km/h
9.7mph 15.6km/h
Average max. wind speed
9.6mph 15.4km/h
9.6mph 15.4km/h
10.4mph 16.7km/h
Average wind speed gusts
14.7mph 23.7km/h
14.6mph 23.5km/h
15.5mph 24.9km/h
Average humidity
72%
75%
72%
Average rainfall
0.55" 14mm
0.67" 17mm
0.51" 13mm
Average rainfall days
5.9
7.5
6.4
Average snowfall
0.04" 1mm
0.16" 4mm
0.55" 14mm
Average snowfall days
0.3
1.4
2.6
Average sea temperature
58.4°F 14.7°C
52°F 11.1°C
47.8°F 8.8°C
Average daylight
10h 1min
9h 3min
9h 5min
Average sunshine
5h 5min
5h 1min
5h 2min
Average sunshine days
22.6
21
21.9
Average UV index
3
2
2
Average cloud cover
35%
43%
42%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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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).

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Shady Side, Maryland, USA

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