December weather forecast
Heritage Hill, MD

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Weather in December

The first month of the winter, December, is still a chilly month in Heritage Hill, Maryland, with temperature in the range of an average low of 34.5°F (1.4°C) and an average high of 45.5°F (7.5°C).

Temperature

December's arrival subtly correlates with a reduction in the average high-temperature, down from a fresh 53.6°F (12°C) in November to a chilly 45.5°F (7.5°C). An average low-temperature of 34.5°F (1.4°C) is recorded during the nights in December in Heritage Hill, Maryland.

Humidity

The average relative humidity in December in Heritage Hill is 76%.

Rainfall

In December, the rain falls for 10.4 days. Throughout December, 2.32" (59mm) of precipitation is accumulated. In Heritage Hill, during the entire year, the rain falls for 157.2 days and collects up to 30.47" (774mm) of precipitation.

Snowfall

Months with snowfall in Heritage Hill, Maryland, are January through March, November and December. In Heritage Hill, Maryland, in December, snow falls for 2.1 days, with typically accumulated 0.39" (10mm) of snow. Throughout the year, in Heritage Hill, there are 11.9 snowfall days, and 5.75" (146mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Heritage Hill, 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 7:25 am and sunset at 4:53 pm EST.

Sunshine

In December, the average sunshine in Heritage Hill, Maryland, is 5.2h.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 2 in December translates into this advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Experience reduced UV exposure by about half when donning a wide-brim hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are December temperatures in Heritage Hill?

An average high-temperature, in December, in Heritage Hill, is 45.5°F (7.5°C) and the average low-temperature is 34.5°F (1.4°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is evaluated at 91.4°F (33°C).

What is the average humidity in December in Heritage Hill?

In Heritage Hill, Maryland, the average relative humidity in December is 76%.

How many days does it rain in December in Heritage Hill?

In Heritage Hill, Maryland, in December, it is raining for 10.4 days, with typically 2.32" (59mm) of accumulated precipitation.

How many days does it snow in December in Heritage Hill?

In Heritage Hill, Maryland, during December, snow falls for 2.1 days and regularly aggregates up to 0.39" (10mm) of snow.

What is the month with the shortest days in Heritage Hill?

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

What is the average length of the day in December in Heritage Hill?

In Heritage Hill, Maryland, the average day length in December is 9h and 28min.

What time are sunrise and sunset in December in Heritage Hill?

On the first day of December in Heritage Hill, sunrise is at 7:07 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:53 pm EST.

How many hours of sunshine does Heritage Hill have in December?

In December, the average sunshine duration is 5.2h.

What are the months with the lowest UV index in Heritage Hill?

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Heritage Hill, Maryland.

What is the UV index reading in December in Heritage Hill?

In Heritage Hill, Maryland, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Heritage Hill, MD

Average temperature in December - Heritage Hill, MD
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in December: 34.5°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

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Average pressure in December
Heritage Hill, MD

Average pressure in December - Heritage Hill, 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
Heritage Hill, MD

Average wind speed in December - Heritage Hill, MD
  • Average wind speed in December: 8.5mph

The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in December
Heritage Hill, MD

Average humidity in December - Heritage Hill, MD
  • Average humidity in December: 76%

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

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Average rainfall in December
Heritage Hill, MD

Average rainfall in December - Heritage Hill, MD
  • Average rainfall in December: 2.32"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.81").

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Average rainfall days in December
Heritage Hill, MD

Average rainfall days in December - Heritage Hill, MD
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and November (8.4 days).

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Average snowfall in December
Heritage Hill, MD

Average snowfall in December - Heritage Hill, MD
  • Average snowfall in December: 0.39"

The month with the highest snowfall is January (2.09").
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
Heritage Hill, MD

Average snowfall days in December - Heritage Hill, MD
  • Average snowfall days in December: 2.1 days

The month with the highest number of snowfall days is January (3.8 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
Heritage Hill, MD

Average daylight in December / Average sunshine in December - Heritage Hill, 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
Heritage Hill, MD

Average sunshine days in December - Heritage Hill, MD
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is November (19.9 days).
The months with the least sunshine days are May and July (10.8 days).

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Average UV index in December
Heritage Hill, MD

Average UV index in December - Heritage Hill, 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).

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Average cloud cover in December
Heritage Hill, MD

Average cloud cover in December - Heritage Hill, 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
Heritage Hill, MD

Average visibility in December - Heritage Hill, 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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Heritage Hill, Maryland, USA

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