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
Hilton Head Island, South Carolina, greets December with an average high-temperature of a still comfortable 61.5°F (16.4°C), marking a slight deviation from the preceding month. In the month of December, the temperature in Hilton Head Island generally rests at an average low of 50.9°F (10.5°C).Humidity
With an average relative humidity of 77%, December is the most humid month in Hilton Head Island.Rainfall
In Hilton Head Island, South Carolina, during December, the rain falls for 11.5 days and regularly aggregates up to 2.32" (59mm) of precipitation. In Hilton Head Island, South Carolina, during the entire year, the rain falls for 175.3 days and collects up to 32.28" (820mm) of precipitation.Snowfall
In Hilton Head Island, snow does not fall in February through December.Ocean temperature
In Hilton Head Island, South Carolina, in December, the average water temperature is 61.5°F (16.4°C).Note: Swimming in 61.5°F (16.4°C) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 69.8°F (21°C).
Daylight
The month with the shortest days is December, with an average of 10h and 6min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:28 pm EST.
Sunshine
With an average of 5.7h of sunshine, December has the least sunshine of the year in Hilton Head Island.UV index
In Hilton Head Island, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 4 leads to the following instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Hilton Head Island?
What is the most humid month in Hilton Head Island?
What is the average humidity in December in Hilton Head Island?
How much does it rain in Hilton Head Island in December?
When it does not snow in Hilton Head Island?
Does it snow in Hilton Head Island in December?
What is the ocean temperature in December in Hilton Head Island?
What is the month with the shortest days in Hilton Head Island?
What is the average length of the day in December in Hilton Head Island?
When is the sunrise / sunset in December in Hilton Head Island?
What is the month with the least sunshine in Hilton Head Island?
How long on average sun shines in December in Hilton Head Island?
What is the UV index intensity in December in Hilton Head Island?
Average temperature in December
Hilton Head Island, 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
Hilton Head 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
Hilton Head Island, 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
Hilton Head Island, 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
Hilton Head Island, 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
Hilton Head Island, 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
Hilton Head Island, 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
Hilton Head Island, 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 sea temperature in December
Hilton Head Island, SC
- Average sea temperature in December: 61.5°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 (57.5°F).
Average daylight in December /
Average sunshine in December
Hilton Head Island, SC
- Average daylight in December: 10h and 1min
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 4min
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
Hilton Head Island, 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
Hilton Head 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
Hilton Head Island, 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
Hilton Head 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).
Hilton Head Island, South Carolina, USA
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