December weather forecast
Rockburn Commons, MD

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Weather in December

December, the first month of the winter in Rockburn Commons, is still a chilly month, with temperature in the range of an average low of 34.2°F (1.2°C) and an average high of 45.5°F (7.5°C).

Temperature

As November transitions into December, Rockburn Commons sees a gentle drop in the average high-temperature, transitioning from a fresh 53.4°F (11.9°C) to a chilly 45.5°F (7.5°C). The average temperature in Rockburn Commons during December nights dips to an icy 34.2°F (1.2°C).

Humidity

The average relative humidity in December in Rockburn Commons is 76%.

Rainfall

In Rockburn Commons, in December, it is raining for 10.1 days, with typically 2.28" (58mm) of accumulated precipitation. In Rockburn Commons, during the entire year, the rain falls for 156.3 days and collects up to 29.61" (752mm) of precipitation.

Snowfall

Months with snowfall in Rockburn Commons are January through March, November and December. In December, in Rockburn Commons, it is snowing for 2.2 days. Throughout December, 0.79" (20mm) of snow is accumulated. In Rockburn Commons, during the entire year, snow falls for 12.8 days and aggregates up to 6.77" (172mm) 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 December, sunrise is at 7:07 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:54 pm EST.

Sunshine

In Rockburn Commons, the average sunshine in December is 5.2h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

What are the temperatures in Rockburn Commons in December?

The high-temperature, in December, in Rockburn Commons, is 45.5°F (7.5°C), while the low-temperature averages to 34.2°F (1.2°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 91.4°F (33°C).

What is the average humidity in December in Rockburn Commons?

The average relative humidity in December is 76%.

How much does it rain in Rockburn Commons in December?

In December, in Rockburn Commons, the rain falls for 10.1 days. Throughout December, 2.28" (58mm) of precipitation is accumulated.

How much does it snow in Rockburn Commons in December?

In Rockburn Commons, Maryland, in December, during 2.2 snowfall days, 0.79" (20mm) of snow is typically accumulated.

What is the month with the shortest days in Rockburn Commons?

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

How many hours of daylight does Rockburn Commons have in December?

In December, the average day length in Rockburn Commons is 9h and 28min.

When is the sunrise / sunset in December in Rockburn Commons?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:54 pm EST.

How long on average sun shines in December in Rockburn Commons?

In December, the average sunshine duration is 5.2h.

What are the months with the lowest UV index in Rockburn Commons?

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

What is the UV index reading in December in Rockburn Commons?

In December, the average daily maximum UV index in Rockburn Commons, Maryland, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from 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
Rockburn Commons, MD

Average temperature in December - Rockburn Commons, MD
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in December: 34.2°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).

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Average pressure in December
Rockburn Commons, MD

Average pressure in December - Rockburn Commons, MD
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in December
Rockburn Commons, MD

Average wind speed in December - Rockburn Commons, MD
  • Average wind speed in December: 8.3mph

The windiest months (with the highest average wind speed) are February and March (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in December
Rockburn Commons, MD

Average humidity in December - Rockburn Commons, MD
  • Average humidity in December: 76%

The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are April and July (72%).

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Average rainfall in December
Rockburn Commons, MD

Average rainfall in December - Rockburn Commons, MD
  • Average rainfall in December: 2.28"

The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (1.77").

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Average rainfall days in December
Rockburn Commons, MD

Average rainfall days in December - Rockburn Commons, MD
  • Average rainfall days in December: 10.1 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.6 days).

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Average snowfall in December
Rockburn Commons, MD

Average snowfall in December - Rockburn Commons, MD
  • Average snowfall in December: 0.79"

The month with the highest snowfall is January (2.24").
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
Rockburn Commons, MD

Average snowfall days in December - Rockburn Commons, MD
  • Average snowfall days in December: 2.2 days

The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Rockburn Commons, MD

Average daylight in December / Average sunshine in December - Rockburn Commons, 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in December
Rockburn Commons, MD

Average sunshine days in December - Rockburn Commons, MD
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is July (10.9 days).

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Average UV index in December
Rockburn Commons, MD

Average UV index in December - Rockburn Commons, 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, November and December (UV index 2).

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Average cloud cover in December
Rockburn Commons, MD

Average cloud cover in December - Rockburn Commons, MD
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in December
Rockburn Commons, MD

Average visibility in December - Rockburn Commons, 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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Rockburn Commons, Maryland, USA

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