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 is marked by a subtle drop in average high-temperatures, transitioning from a fresh 52.7°F (11.5°C) in November to a frosty 45°F (7.2°C). During December, the nighttime temperatures in Southold align closely with the daytime averages, measuring a cold 37.9°F (3.3°C).Humidity
In Southold, the average relative humidity in December is 74%.Rainfall
December is the month with the most rainfall in Southold. Rain falls for 12.8 days and accumulates 3.82" (97mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Southold, New York. In Southold, during December, snow falls for 2.3 days and regularly aggregates up to 0.91" (23mm) of snow. In Southold, New York, during the entire year, snow falls for 13.9 days and aggregates up to 6.61" (168mm) of snow.Daylight
December has the shortest days of the year in Southold, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:56 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:31 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 4.6h of sunshine.UV index
The months with the lowest UV index in Southold are January through March and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Southold?
What is the average humidity in December in Southold?
What is the rainiest month in Southold?
How much does it rain in Southold in December?
How much does it snow in Southold in December?
What is the month with the shortest days in Southold?
How many hours of daylight does Southold have in December?
When is the sunrise / sunset in December in Southold?
What is the month with the least sunshine in Southold?
How many hours of sunshine does Southold have in December?
What are the months with the lowest UV index in Southold?
How high is the UV index in December in Southold?
Average temperature in December
Southold, NY
- Average high temperature in December: 45°F
The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 37.9°F
The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in December
Southold, NY
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Southold, NY
- Average wind speed in December: 15.7mph
The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.4mph).
Average humidity in December
Southold, NY
- Average humidity in December: 74%
The months with the highest relative humidity are May and June (81%).
The month with the lowest relative humidity is November (72%).
Average rainfall in December
Southold, NY
- Average rainfall in December: 3.82"
The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in December
Southold, NY
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Southold, NY
- Average snowfall in December: 0.91"
The month with the highest snowfall is March (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Southold, NY
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is January (4.2 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
Southold, 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 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in December
Southold, NY
- Average sunshine days in December: 13.7 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in December
Southold, 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 and December (UV index 2).
Average cloud cover in December
Southold, NY
- Average cloud cover in December: 52
The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Southold, 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).
Southold, New York, USA
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