December weather forecastFolly Beach, SC
December
Weather in December
December marks the end of the year, with the weather in Folly Beach dipping further, showcasing a temperature range from 51.1°F (10.6°C) to 60.6°F (15.9°C). Winter isn't synonymous with snowfall as evidenced by the zero snowfall days in December. Despite the decrease in temperatures, there's a rise in rainfall compared to November. An increase can also be noticed in wind speeds from November. Even though it's the last month of the year, December ends on a mild note, consistent with the general weather pattern of Folly Beach.Temperature
December's average high-temperature stands at a moderate 60.6°F (15.9°C), showing little deviation from November's 65.8°F (18.8°C). In December, Folly Beach encounters an average low-temperature of 51.1°F (10.6°C) during the night.Humidity
December is the most humid month in Folly Beach, with an average relative humidity of 78%.Rainfall
In December, the rain falls for 6.2 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 113.3 rainfall days, and 10" (254mm) of precipitation is accumulated.Snowfall
January and December are months with snowfall. December is the first month it typically snows in Folly Beach. Throughout December, there are 0.1 snowfall days. Throughout the year, there are 0.3 snowfall days.Ocean temperature
In December, the average ocean temperature is 66.2°F (19°C).Note: The enjoyment of swimming decreases for most when the surface water temperature is 66.2°F (19°C). Breathing control becomes increasingly challenging as temperatures descend below 69.8°F (21°C).
Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 5:13 pm. On the last day of December, sunrise is at 7:21 am and sunset at 5:24 pm EST.
Sunshine
With an average of 5.7h of sunshine, December has the least sunshine of the year.UV index
In December, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 4 during December translates into the following directions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Folly Beach, SC
- Average high temperature in December: 60.6°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in December: 51.1°F
The months with the highest average low temperature are July and August (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).
Average pressure in December
Folly Beach, SC
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Folly Beach, SC
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in December
Folly Beach, SC
- Average humidity in December: 78%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January, March and October (73%).
Average rainfall in December
Folly Beach, SC
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in December
Folly Beach, SC
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is August (17.3 days).
The month with the least rainy days is November (5.2 days).
Average snowfall days in December
Folly Beach, SC
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Folly Beach, SC
- Average sea temperature in December: 66.3°F
The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (61.9°F).
Average daylight in December /
Average sunshine in December
Folly Beach, SC
- Average daylight in December: 10h and 0min
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 0min).
- Average sunshine in December: 5h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Folly Beach, SC
- Average sunshine days in December: 23.5 days
The month with the most sunshine days is January (23.9 days).
The month with the least sunshine days is August (8.5 days).
Average UV index in December
Folly Beach, 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
Folly Beach, SC
- Average cloud cover in December: 39
The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 25).
Average visibility in December
Folly Beach, 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).
