December weather forecastSylvan Beach, NY
December
Weather in December
The first month of the winter, December, is also a wintry month in Sylvan Beach, New York, with an average temperature fluctuating between 24.4°F (-4.2°C) and 33.3°F (0.7°C).Temperature
A decrease in the average high-temperature is observed during December, shifting from a frosty 43.9°F (6.6°C) in November to a wintry 33.3°F (0.7°C). Sylvan Beach upholds a consistent average temperature of 24.4°F (-4.2°C) throughout the nights of December.Humidity
In December, the average relative humidity is 86%.Rainfall
In Sylvan Beach, during December, the rain falls for 11.7 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Sylvan Beach, New York, during the entire year, the rain falls for 174.7 days and collects up to 30.63" (778mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Sylvan Beach, New York, in December, snow falls for 16.8 days, with typically accumulated 7.56" (192mm) of snow. Throughout the year, in Sylvan Beach, there are 84.3 snowfall days, and 32.95" (837mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Sylvan Beach.On the first day of the month, sunrise is at 7:15 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:37 pm EST.
Sunshine
In Sylvan Beach, the average sunshine in December is 2.9h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Sylvan Beach. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum high daily UV index of 1 during December translates into the following directions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Boost your sun resistance with garments that are densely woven yet spacious. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sylvan Beach, NY
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in December
Sylvan Beach, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Sylvan Beach, NY
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in December
Sylvan Beach, NY
- Average humidity in December: 86%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April and May (78%).
Average rainfall in December
Sylvan Beach, NY
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Sylvan Beach, NY
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is August (17.8 days).
The month with the least rainy days is February (9 days).
Average snowfall in December
Sylvan Beach, NY
- Average snowfall in December: 7.56"
The month with the highest snowfall is February (7.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sylvan Beach, NY
- Average snowfall days in December: 16.8 days
The month with the highest number of snowfall days is January (20.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sylvan Beach, NY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 2h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in December
Sylvan Beach, NY
- Average sunshine days in December: 6.5 days
The month with the most sunshine days is September (14.4 days).
The month with the least sunshine days is February (4.8 days).
Average UV index in December
Sylvan Beach, NY
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Sylvan Beach, NY
- Average cloud cover in December: 70
The months with the most cloud cover are January and February (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Sylvan Beach, NY
- Average visibility in December: 5mi
The months with the highest visibility are April and October (6mi).
The months with the lowest visibility are January and February (4mi).
