December weather forecast
Glenmont Hills, MD

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Weather in December

December, the first month of the winter in Glenmont Hills, is still a chilly month, with an average temperature fluctuating between 32.9°F (0.5°C) and 45.3°F (7.4°C).

Temperature

The arrival of December correlates with a minor temperature reduction, down from November's fresh 53.4°F (11.9°C) to a frosty 45.3°F (7.4°C). In December, the temperature drops to an average of 32.9°F (0.5°C) at night.

Humidity

The months with the highest humidity are May, October and December, with an average relative humidity of 76%.

Rainfall

In Glenmont Hills, during December, the rain falls for 10.2 days and regularly aggregates up to 2.76" (70mm) of precipitation. Throughout the year, there are 160.9 rainfall days, and 32.99" (838mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In December, it is snowing for 2.9 days. Throughout December, 1.38" (35mm) of snow is accumulated. In Glenmont Hills, during the entire year, snow falls for 17.1 days and aggregates up to 10.2" (259mm) of snow.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:08 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:55 pm EST.

Sunshine

The average sunshine in December is 5.1h.

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 minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. It's recommended to limit sun exposure when its radiation is at its peak during midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.

Frequently asked questions

What is the average December temperature?

The average high-temperature and low-temperature during December are 45.3°F (7.4°C) and 32.9°F (0.5°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is evaluated at 93.2°F (34°C).

What is the most humid month?

The months with the highest humidity are May, October and December, with an average relative humidity of 76%.

What is the average humidity in December?

The average relative humidity in December is 76%.

How much does it rain in Glenmont Hills in December?

In Glenmont Hills, Maryland, in December, during 10.2 rainfall days, 2.76" (70mm) of precipitation is typically accumulated.

How many days does it snow in December?

In December, it is snowing for 2.9 days. Throughout December, 1.38" (35mm) of snow is accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Glenmont Hills have in December?

In December, the average day length is 9h and 29min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:08 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:55 pm EST.

How long on average sun shines in December?

The average sunshine duration in December is 5.1h.

What are the months with the lowest UV index?

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

What is the UV index intensity in December?

In Glenmont Hills, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
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
Glenmont Hills, MD

Average temperature in December - Glenmont Hills, MD
  • Average high temperature in December: 45.3°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

Average pressure in December
Glenmont Hills, MD

Average pressure in December - Glenmont Hills, 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 (29.95"Hg).

Average wind speed in December
Glenmont Hills, MD

Average wind speed in December - Glenmont Hills, MD
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in December
Glenmont Hills, MD

Average humidity in December - Glenmont Hills, MD
  • Average humidity in December: 76%

The months with the highest relative humidity are May, October and December (76%).
The month with the lowest relative humidity is July (70%).

Average rainfall in December
Glenmont Hills, MD

Average rainfall in December - Glenmont Hills, MD
  • Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.17").

Average rainfall days in December
Glenmont Hills, MD

Average rainfall days in December - Glenmont Hills, MD
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in December
Glenmont Hills, MD

Average snowfall in December - Glenmont Hills, MD
  • Average snowfall in December: 1.38"

The months with the highest snowfall are January and March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Glenmont Hills, MD

Average snowfall days in December - Glenmont Hills, MD
  • Average snowfall days in December: 2.9 days

The months with the highest number of snowfall days are January and February (5.1 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
Glenmont Hills, MD

Average daylight in December / Average sunshine in December - Glenmont Hills, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in December
Glenmont Hills, MD

Average sunshine days in December - Glenmont Hills, MD
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is November (19.4 days).
The months with the least sunshine days are May and July (11 days).

Average UV index in December
Glenmont Hills, MD

Average UV index in December - Glenmont Hills, 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
Glenmont Hills, MD

Average cloud cover in December - Glenmont Hills, MD
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Glenmont Hills, MD

Average visibility in December - Glenmont Hills, MD
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Glenmont Hills, Maryland, USA

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