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
In Glenn Dale, the average high-temperature in December slightly decreases from a cool 54°F (12.2°C) in November to a chilly 45.5°F (7.5°C). In December, in Glenn Dale, the average low-temperature is 34.5°F (1.4°C).Humidity
The average relative humidity in December is 76%.Rainfall
In Glenn Dale, Maryland, during December, the rain falls for 9.8 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Glenn Dale, Maryland, 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 Glenn Dale, snow falls for 2.4 days, with typically accumulated 0.63" (16mm) of snow. Throughout the year, there are 13.6 snowfall days, and 6.73" (171mm) of snow is accumulated.Daylight
With an average of 9h and 29min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:06 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:54 pm EST.
Sunshine
The average sunshine in December in Glenn Dale is 5.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
FAQ
What is the temperature in December 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?
When is the sunrise / sunset in December in Glenn Dale?
How long on average sun shines in December in Glenn Dale?
What is the month with the lowest UV index in Glenn Dale?
How high is the UV index 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).
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