December weather forecast
Holly Anna Acres, MD

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Weather in December

The first month of the winter, December, is also a frosty month in Holly Anna Acres, Maryland, with an average temperature ranging between max 45.5°F (7.5°C) and min 34.7°F (1.5°C).

Temperature

The onset of December entails a subtle temperature shift, as the average high-temperature eases from a fresh 53.8°F (12.1°C) in November to a chilly 45.5°F (7.5°C). The average temperature during December nights dips to a cold 34.7°F (1.5°C).

Humidity

The average relative humidity in December is 75%.

Rainfall

In Holly Anna Acres, in December, it is raining for 11.4 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, in Holly Anna Acres, Maryland, there are 155.7 rainfall days, and 31.22" (793mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall in Holly Anna Acres. In Holly Anna Acres, during December, snow falls for 2.4 days and regularly aggregates up to 0.63" (16mm) of snow. In Holly Anna Acres, during the entire year, snow falls for 14 days and aggregates up to 6.14" (156mm) 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 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 Holly Anna Acres, the average sunshine in December is 5.2h.

UV index

January, November 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 low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the UV index of 2 transforms into the following advice:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.

Frequently asked questions

What is the temperature in December?

The average high-temperature, in December, in Holly Anna Acres, is 45.5°F (7.5°C), while the average low-temperature is 34.7°F (1.5°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is estimated at 91.4°F (33°C).

What is the average humidity in December?

In Holly Anna Acres, the average relative humidity in December is 75%.

How much does it rain in December?

In December, the rain falls for 11.4 days. Throughout December, 2.83" (72mm) of precipitation is accumulated.

How much does it snow in December?

In Holly Anna Acres, in December, during 2.4 snowfall days, 0.63" (16mm) of snow is typically accumulated.

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 Holly Anna Acres, the average day length in December 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 is the month with the lowest UV index?

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

How high is the UV index in December?

In Holly Anna Acres, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents 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
Holly Anna Acres, MD

Average temperature in December - Holly Anna Acres, 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 (39.6°F).

  • Average low temperature in December: 34.7°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

Average pressure in December
Holly Anna Acres, MD

Average pressure in December - Holly Anna Acres, 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).

Average wind speed in December
Holly Anna Acres, MD

Average wind speed in December - Holly Anna Acres, MD
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in December
Holly Anna Acres, MD

Average humidity in December - Holly Anna Acres, 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
Holly Anna Acres, MD

Average rainfall in December - Holly Anna Acres, MD
  • Average rainfall in December: 2.83"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in December
Holly Anna Acres, MD

Average rainfall days in December - Holly Anna Acres, MD
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).

Average snowfall in December
Holly Anna Acres, MD

Average snowfall in December - Holly Anna Acres, MD
  • Average snowfall in December: 0.63"

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Holly Anna Acres, MD

Average snowfall days in December - Holly Anna Acres, MD
  • Average snowfall days in December: 2.4 days

The month with the highest number of snowfall days is January (4.4 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
Holly Anna Acres, MD

Average daylight in December / Average sunshine in December - Holly Anna Acres, 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).

Average sunshine days in December
Holly Anna Acres, MD

Average sunshine days in December - Holly Anna Acres, MD
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in December
Holly Anna Acres, MD

Average UV index in December - Holly Anna Acres, 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, November and December (UV index 2).

Average cloud cover in December
Holly Anna Acres, MD

Average cloud cover in December - Holly Anna Acres, 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
Holly Anna Acres, MD

Average visibility in December - Holly Anna Acres, 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).

Holly Anna Acres, Maryland, USA

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