December weather forecastBluffton, SC
December
Weather in December
December is marked by cooler temperatures, as winter firmly settles in Bluffton. Now the thermometer reflects readings between 50.9°F (10.5°C) and 61.5°F (16.4°C), clearly indicating the winter season's onset. Correspondingly, rainfall increases slightly to 2.32" (59mm), providing a touch of moisture to the cold air. As the days shorten and temperatures drop, residents experience a distinctive Southern winter. The year ends with a mix of celebration and anticipation for another cycle of Bluffton’s uniquely fascinating weather pattern.Temperature
As Bluffton transitions from November to December, the average high-temperatures adjust to a still enjoyable 61.5°F (16.4°C), nearly the same as the previous 66.4°F (19.1°C). Bluffton reports an average nighttime low-temperature of 50.9°F (10.5°C) in December.Humidity
December is the most humid month, with an average relative humidity of 77%.Rainfall
In Bluffton, South Carolina, in December, it is raining for 11.5 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 175.3 rainfall days, and 32.28" (820mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.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 7:07 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:29 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 5.7h of sunshine.UV index
In December, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during December leads to these instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bluffton, SC
- Average high temperature in December: 61.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (57.4°F).
- Average low temperature in December: 50.9°F
The month with the highest average low temperature is July (77.9°F).
The coldest month (with the lowest average low temperature) is January (46°F).
Average pressure in December
Bluffton, 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
Bluffton, SC
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are January, March and April (9.6mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in December
Bluffton, SC
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is January (72%).
Average rainfall in December
Bluffton, SC
- Average rainfall in December: 2.32"
The wettest month (with the highest rainfall) is August (6.06").
The driest month (with the least rainfall) is January (1.02").
Average rainfall days in December
Bluffton, SC
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is August (25 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Bluffton, SC
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Bluffton, SC
- Average snowfall days in December: 0 days
The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Bluffton, SC
- Average daylight in December: 10h and 6min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in December: 5h and 42min
The months with the most sunshine are June and July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Bluffton, SC
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (2.8 days).
Average UV index in December
Bluffton, 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
Bluffton, SC
- Average cloud cover in December: 38
The months with the most cloud cover are February and December (Cloud cover 38).
The months with the least cloud cover are June and July (Cloud cover 25).
Average visibility in December
Bluffton, 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).
