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 transition to December results in a modest reduction in average high-temperature, moving from a cool 51.6°F (10.9°C) in November to a chilly 43.5°F (6.4°C). Roslyn Estates, during the nights of December, averages a temperature close to its daytime high, at a wintry 35.6°F (2°C).Humidity
In Roslyn Estates, New York, the average relative humidity in December is 74%.Rainfall
In Roslyn Estates, in December, during 11.7 rainfall days, 3.66" (93mm) of precipitation is typically accumulated. Throughout the year, there are 158.5 rainfall days, and 36.38" (924mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Roslyn Estates, in December, during 2.7 snowfall days, 1.42" (36mm) of snow is typically accumulated. In Roslyn Estates, during the entire year, snow falls for 15.8 days and aggregates up to 5.91" (150mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:00 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:37 pm EST.
Sunshine
In December, the average sunshine is 5h.UV index
January through March, 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 low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Roslyn Estates have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Roslyn Estates have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Roslyn Estates, NY
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in December: 35.6°F
The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).
Average pressure in December
Roslyn Estates, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Roslyn Estates, NY
- Average wind speed in December: 11.9mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in December
Roslyn Estates, NY
- Average humidity in December: 74%
The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).
Average rainfall in December
Roslyn Estates, NY
- Average rainfall in December: 3.66"
The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in December
Roslyn Estates, NY
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (8 days).
Average snowfall in December
Roslyn Estates, NY
- Average snowfall in December: 1.42"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Roslyn Estates, NY
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Roslyn Estates, NY
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Roslyn Estates, NY
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in December
Roslyn Estates, NY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Roslyn Estates, NY
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Roslyn Estates, NY
- 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).
Roslyn Estates, New York, USA
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