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 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 subtle shift in Seabrook Island's weather is observed as November turns into December, with the average high temperature reducing from a comfortable 66.2°F (19°C) to a still refreshing 60.6°F (15.9°C). Throughout December, Seabrook Island registers a consistent average low-temperature of 48°F (8.9°C).Humidity
With an average relative humidity of 77%, December is the most humid month.Rainfall
In Seabrook Island, in December, during 7.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 118.7 rainfall days, and 10.63" (270mm) of precipitation is accumulated.Snowfall
January and December are months with snowfall. The months with the most snowfall days are January and December, with an average of 0.1 snowfall days.Daylight
December has the shortest days of the year, with an average of 10h and 6min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:25 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.7h of sunshine.UV index
The average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 4 during December translates into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Enhance your sun protection with tightly woven, yet airy clothing. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Seabrook Island in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
What is the snowiest month?
When does it start to snow?
What is the month with the shortest days?
How many hours of daylight does Seabrook Island have in December?
What time are sunrise and sunset in December in Seabrook Island?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
Seabrook Island, SC
- Average high temperature in December: 60.6°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (57.2°F).
- Average low temperature in December: 48°F
The month with the highest average low temperature is July (76.5°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).
Average pressure in December
Seabrook Island, SC
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in December
Seabrook Island, SC
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Seabrook Island, SC
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January and March (72%).
Average rainfall in December
Seabrook Island, SC
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is August (1.73").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in December
Seabrook Island, SC
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is August (16.9 days).
The month with the least rainy days is November (5.7 days).
Average snowfall days in December
Seabrook Island, SC
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are January and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Seabrook Island, SC
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Seabrook Island, SC
- Average sunshine days in December: 21.7 days
The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is August (9.6 days).
Average UV index in December
Seabrook Island, SC
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in December
Seabrook Island, SC
- Average cloud cover in December: 39
The months with the most cloud cover are February and December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 25).
Average visibility in December
Seabrook Island, SC
- 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).
Seabrook Island, South Carolina, USA
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