December weather forecast
Greenlawn Shores, MD

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Weather in December

December, the first month of the winter in Greenlawn Shores, is also a frosty month, 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

Greenlawn Shores's December weather features a light decline in high-temperatures, reducing from a cool 53.6°F (12°C) in November to a frosty 45.5°F (7.5°C). An average temperature of 34.5°F (1.4°C) is recorded during the nights in December.

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Greenlawn Shores, during December, the rain falls for 10.4 days and regularly aggregates up to 2.32" (59mm) of precipitation. In Greenlawn Shores, during the entire year, the rain falls for 157.2 days and collects up to 30.47" (774mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Greenlawn Shores, during December, snow falls for 2.1 days and regularly aggregates up to 0.39" (10mm) of snow. In Greenlawn Shores, during the entire year, snow falls for 11.9 days and aggregates up to 5.75" (146mm) 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 4:43 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 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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures?

The high-temperature, in December, in Greenlawn Shores, records 45.5°F (7.5°C), while the low-temperature is 34.5°F (1.4°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in August is computed to be 91.4°F (33°C).

What is the average humidity in December?

The average relative humidity in December is 76%.

How much does it rain in December?

In Greenlawn Shores, in December, during 10.4 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Greenlawn Shores, 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?

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

What is the average length of the day in December in Greenlawn Shores?

The average day length in December is 9h and 28min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:07 am and sunset at 4:43 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 Greenlawn Shores have in December?

The average sunshine duration in December is 5.2h.

When is the lowest UV index?

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

How high is the UV index in December?

In Greenlawn Shores, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health threat from exposure to the Sun's 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
Greenlawn Shores, MD

Average temperature in December - Greenlawn Shores, 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).

Average pressure in December
Greenlawn Shores, MD

Average pressure in December - Greenlawn Shores, 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
Greenlawn Shores, MD

Average wind speed in December - Greenlawn Shores, 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).

Average humidity in December
Greenlawn Shores, MD

Average humidity in December - Greenlawn Shores, 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%).

Average rainfall in December
Greenlawn Shores, MD

Average rainfall in December - Greenlawn Shores, 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").

Average rainfall days in December
Greenlawn Shores, MD

Average rainfall days in December - Greenlawn Shores, 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).

Average snowfall in December
Greenlawn Shores, MD

Average snowfall in December - Greenlawn Shores, 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").

Average snowfall days in December
Greenlawn Shores, MD

Average snowfall days in December - Greenlawn Shores, 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).

Average daylight in December /
Average sunshine in December
Greenlawn Shores, MD

Average daylight in December / Average sunshine in December - Greenlawn Shores, 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
Greenlawn Shores, MD

Average sunshine days in December - Greenlawn Shores, 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).

Average UV index in December
Greenlawn Shores, MD

Average UV index in December - Greenlawn Shores, 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
Greenlawn Shores, MD

Average cloud cover in December - Greenlawn Shores, 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).

Average visibility in December
Greenlawn Shores, MD

Average visibility in December - Greenlawn Shores, 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).

Greenlawn Shores, Maryland, USA

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