December weather forecast
Royal Oak, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Royal Oak, Maryland, with an average temperature varying between 36.5°F (2.5°C) and 46.2°F (7.9°C).

Temperature

December reveals a small adjustment in temperature, transitioning from an average high of a fresh 54.5°F (12.5°C) in November to a chilly 46.2°F (7.9°C). The average temperature during December nights is registered at an icy 36.5°F (2.5°C).

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Royal Oak, in December, it is raining for 11.2 days, with typically 2.95" (75mm) of accumulated precipitation. Throughout the year, there are 157.2 rainfall days, and 33.27" (845mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In December, it is snowing for 1.6 days. Throughout December, 0.67" (17mm) of snow is accumulated. Throughout the year, there are 9.8 snowfall days, and 3.82" (97mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:04 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:53 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 and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 2 during December translates into the following directions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Avoiding the Sun during its peak radiation time around midday is a healthy practice. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Updated: Jun 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

Royal Oak in December has an average high-temperature of 46.2°F (7.9°C) and an average low-temperature of 36.5°F (2.5°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is estimated at 89.6°F (32°C).

What is the average humidity in December?

In December, the average relative humidity is 76%.

How many days does it rain in December?

In December, the rain falls for 11.2 days. Throughout December, 2.95" (75mm) of precipitation is accumulated.

How much does it snow in Royal Oak in December?

In Royal Oak, Maryland, in December, snow falls for 1.6 days, with typically accumulated 0.67" (17mm) of snow.

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.

What is the average length of the day in December in Royal Oak?

The average day length in December is 9h and 31min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:53 pm EST.

What are the months with the least sunshine?

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

How long on average sun shines in December?

In Royal Oak, the average sunshine duration in December is 5.2h.

What are the months with the lowest UV index?

January 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 in Royal Oak 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
Royal Oak, MD

Average temperature in December - Royal Oak, MD
  • Average high temperature in December: 46.2°F

The warmest month (with the highest average high temperature) is July (84.4°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 (71.8°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in December
Royal Oak, MD

Average pressure in December - Royal Oak, 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
Royal Oak, MD

Average wind speed in December - Royal Oak, MD
  • Average wind speed in December: 9.2mph

The windiest months (with the highest average wind speed) are February and March (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in December
Royal Oak, MD

Average humidity in December - Royal Oak, MD
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).

Average rainfall in December
Royal Oak, MD

Average rainfall in December - Royal Oak, MD
  • Average rainfall in December: 2.95"

The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is January (1.93").

Average rainfall days in December
Royal Oak, MD

Average rainfall days in December - Royal Oak, MD
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is May (17.2 days).
The months with the least rainy days are January and November (8.8 days).

Average snowfall in December
Royal Oak, MD

Average snowfall in December - Royal Oak, MD
  • Average snowfall in December: 0.67"

The month with the highest snowfall is March (1.22").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Royal Oak, MD

Average snowfall days in December - Royal Oak, MD
  • Average snowfall days in December: 1.6 days

The month with the highest number of snowfall days is January (3.2 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
Royal Oak, MD

Average daylight in December / Average sunshine in December - Royal Oak, 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
Royal Oak, MD

Average sunshine days in December - Royal Oak, MD
  • Average sunshine days in December: 17.7 days

The month with the most sunshine days is November (19.7 days).
The months with the least sunshine days are May and August (11.8 days).

Average UV index in December
Royal Oak, MD

Average UV index in December - Royal Oak, 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 and December (UV index 2).

Average cloud cover in December
Royal Oak, MD

Average cloud cover in December - Royal Oak, MD
  • Average cloud cover in December: 43

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in December
Royal Oak, MD

Average visibility in December - Royal Oak, 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).

Royal Oak, Maryland, USA

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