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
A modest decline in the average high-temperature is seen during December, decreasing from a cool 51.6°F (10.9°C) in November to a chilly 43.5°F (6.4°C). In December, Roslyn Heights experiences a marginal drop in temperature, with averages of 35.6°F (2°C) at night.Humidity
The average relative humidity in December in Roslyn Heights is 74%.Rainfall
In Roslyn Heights, during December, the rain falls for 11.7 days and regularly aggregates up to 3.66" (93mm) of precipitation. In Roslyn Heights, during the entire year, the rain falls for 158.5 days and collects up to 36.38" (924mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Roslyn Heights. In December, it is snowing for 2.7 days. Throughout December, 1.42" (36mm) of snow is accumulated. Throughout the year, in Roslyn Heights, there are 15.8 snowfall days, and 5.91" (150mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December in Roslyn Heights, New York, 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
The months with the lowest UV index in Roslyn Heights, New York, are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. To guard against the harmful effects of the Sun, minimize exposure during midday. Boost your sun resistance with garments that are densely woven yet spacious. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Roslyn Heights during December?
What is the average humidity in December in Roslyn Heights?
How many days does it rain in December in Roslyn Heights?
How many days does it snow in December in Roslyn Heights?
What is the month with the shortest days in Roslyn Heights?
How many hours of daylight does Roslyn Heights have in December?
What time are sunrise and sunset in December in Roslyn Heights?
How long on average sun shines in December in Roslyn Heights?
What are the months with the lowest UV index in Roslyn Heights?
What is the UV index intensity in December in Roslyn Heights?
Average temperature in December
Roslyn Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, 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 Heights, New York, USA
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