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
December's onset introduces a mild reduction in the average high-temperature, from a fresh 53.6°F (12°C) in November to a frosty 45.3°F (7.4°C). Adelphi Park records an average temperature drop to a wintry 33.3°F (0.7°C) in December.Humidity
The months with the highest humidity are May, October and December, with an average relative humidity of 75%.Rainfall
In Adelphi Park, Maryland, during December, the rain falls for 10.4 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Adelphi Park, during the entire year, the rain falls for 154.8 days and collects up to 30.28" (769mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Adelphi Park, in December, during 2.5 snowfall days, 1.34" (34mm) of snow is typically accumulated. In Adelphi Park, during the entire year, snow falls for 15 days and aggregates up to 9.17" (233mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Adelphi Park.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 7:26 am and sunset at 4:55 pm EST.
Sunshine
In December, the average sunshine is 5h.UV index
The months with the lowest UV index in Adelphi Park are January, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
What is the average December temperature in Adelphi Park?
What are the most humid months in Adelphi Park?
What is the average humidity in December in Adelphi Park?
How many days does it rain in December in Adelphi Park?
How many days does it snow in December in Adelphi Park?
What is the month with the shortest days in Adelphi Park?
What is the average length of the day in December in Adelphi Park?
What time are sunrise and sunset in December in Adelphi Park?
How long on average sun shines in December in Adelphi Park?
What are the months with the lowest UV index in Adelphi Park?
How high is the UV index in December in Adelphi Park?
Average temperature in December
Adelphi Park, MD
- Average high temperature in December: 45.3°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in December
Adelphi Park, 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
Adelphi Park, 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 (5.2mph).
Average humidity in December
Adelphi Park, MD
- Average humidity in December: 75%
The months with the highest relative humidity are May, October and December (75%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Adelphi Park, MD
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (1.89").
Average rainfall days in December
Adelphi Park, MD
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Adelphi Park, MD
- Average snowfall in December: 1.34"
The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Adelphi Park, MD
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.6 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
Adelphi Park, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Adelphi Park, MD
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (12 days).
Average UV index in December
Adelphi Park, 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
Adelphi Park, MD
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Adelphi Park, 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).
Adelphi Park, Maryland, USA
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