Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The onset of December is marked by a minor decrease in temperature, transitioning from a fresh 54°F (12.2°C) in November to a chilly 45.5°F (7.5°C). In December, Glenn Dale records an average nighttime temperature of 34.5°F (1.4°C).Humidity
In Glenn Dale, Maryland, the average relative humidity in December is 76%.Rainfall
In Glenn Dale, during December, the rain falls for 9.8 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Glenn Dale, during the entire year, the rain falls for 156.7 days and collects up to 31.81" (808mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Glenn Dale, in December, during 2.4 snowfall days, 0.63" (16mm) of snow is typically accumulated. Throughout the year, there are 13.6 snowfall days, and 6.73" (171mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December in Glenn Dale, sunrise is at 7:07 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:55 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the UV index of 2 transforms into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. 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. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What are December temperatures in Glenn Dale?
What is the average humidity in December in Glenn Dale?
How many days does it rain in December in Glenn Dale?
How much does it snow in Glenn Dale in December?
What is the month with the shortest days in Glenn Dale?
What is the average length of the day in December in Glenn Dale?
What time are sunrise and sunset in December in Glenn Dale?
How many hours of sunshine does Glenn Dale have in December?
What are the months with the lowest UV index in Glenn Dale?
What is the UV index intensity in December in Glenn Dale?
Average temperature in December
Glenn Dale, MD
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in December: 34.5°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28°F).
Average pressure in December
Glenn Dale, 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
Glenn Dale, MD
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in December
Glenn Dale, MD
- Average humidity in December: 76%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Glenn Dale, MD
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in December
Glenn Dale, MD
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in December
Glenn Dale, MD
- Average snowfall in December: 0.63"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Glenn Dale, MD
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is January (4.3 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
Glenn Dale, 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 0min).
Average sunshine days in December
Glenn Dale, MD
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Glenn Dale, 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 and December (UV index 2).
Average cloud cover in December
Glenn Dale, MD
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Glenn Dale, 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).
Glenn Dale, Maryland, USA
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