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 sea temperature 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
As December begins, there is a minor decrease in the average high-temperature, softly falling from a fresh 51.4°F (10.8°C) in November to a chilly 43.3°F (6.3°C). A consistent nighttime average temperature of 35.4°F (1.9°C) is maintained during December.Humidity
In Cold Spring Harbor, the average relative humidity in December is 74%.Rainfall
In Cold Spring Harbor, New York, in December, during 11.5 rainfall days, 3.62" (92mm) of precipitation is typically accumulated. In Cold Spring Harbor, during the entire year, the rain falls for 152.5 days and collects up to 35.04" (890mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Cold Spring Harbor. In Cold Spring Harbor, in December, snow falls for 2.8 days, with typically accumulated 1.46" (37mm) of snow. Throughout the year, there are 15.5 snowfall days, and 5.71" (145mm) of snow is accumulated.Ocean temperature
In December, the average ocean temperature is 48.9°F (9.4°C).Note: Diving into 48.9°F (9.4°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.
Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:26 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:36 pm EST.
Sunshine
In Cold Spring Harbor, the average sunshine in December is 4.9h.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 value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the water temperature in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index in Cold Spring Harbor?
What is the UV index intensity in December in Cold Spring Harbor?
Average temperature in December
Cold Spring Harbor, NY
- Average high temperature in December: 43.3°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).
Average pressure in December
Cold Spring Harbor, 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 (29.93"Hg).
Average wind speed in December
Cold Spring Harbor, NY
- Average wind speed in December: 11.7mph
The windiest month (with the highest average wind speed) is January (12.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Cold Spring Harbor, 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
Cold Spring Harbor, NY
- Average rainfall in December: 3.62"
The wettest month (with the highest rainfall) is July (4.09").
The driest month (with the least rainfall) is January (2.09").
Average rainfall days in December
Cold Spring Harbor, NY
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in December
Cold Spring Harbor, NY
- Average snowfall in December: 1.46"
The month with the highest snowfall is March (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Cold Spring Harbor, NY
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Cold Spring Harbor, NY
- Average sea temperature in December: 49°F
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in December /
Average sunshine in December
Cold Spring Harbor, 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: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Cold Spring Harbor, NY
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in December
Cold Spring Harbor, 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
Cold Spring Harbor, NY
- Average cloud cover in December: 48
The month with the most cloud cover is December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Cold Spring Harbor, 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).
Cold Spring Harbor, New York, USA
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