Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Hilton Head Island's average high-temperature in August sits at a still tropical 87.1°F (30.6°C), showing little difference from the previous month. August brings an average low-temperature of 77.5°F (25.3°C) to Hilton Head Island.Heat index
The heat index in August is appraised at a sweltering 100.4°F (38°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
In Hilton Head Island, the average relative humidity in August is 76%.Rainfall
August is the month with the most rainfall. Rain falls for 25 days and accumulates 6.06" (154mm) of precipitation.Snowfall
February through December are months without snowfall in Hilton Head Island, South Carolina.Ocean temperature
With an average ocean temperature of 83.5°F (28.6°C), August is the month with the warmest seawater.Note: Swimming, diving, and other water endeavors at temperatures between 77°F (25°C) and 84.2°F (29°C) are considered enjoyable and satisfying for extended periods without discomfort.
Daylight
In August, the average length of the day is 13h and 18min.On the first day of August in Hilton Head Island, sunrise is at 6:38 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 7:48 pm EDT.
Sunshine
In Hilton Head Island, the average sunshine in August is 10.8h.UV index
May through August, with an average maximum UV index of 7, are months with the highest UV index in Hilton Head Island. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 7 in August translates into this advice:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Beware! Reflecting off water and sand, UV rays are much stronger.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Hilton Head Island in August?
What is the average humidity in August in Hilton Head Island?
What is the rainiest month in Hilton Head Island?
How many days does it rain in August in Hilton Head Island?
When it does not snow in Hilton Head Island?
What month is the ocean warmest in Hilton Head Island?
What is the water temperature in August in Hilton Head Island?
What is the average length of the day in August in Hilton Head Island?
What time are sunrise and sunset in August in Hilton Head Island?
How many hours of sunshine does Hilton Head Island have in August?
When is the highest UV index in Hilton Head Island?
How high is the UV index in August in Hilton Head Island?
Average temperature in August
Hilton Head Island, SC
- Average high temperature in August: 87.1°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 August: 77.5°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 August
Hilton Head Island, SC
- Average pressure in August: 29.98"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 August
Hilton Head Island, SC
- Average wind speed in August: 7.8mph
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 August
Hilton Head Island, SC
- Average humidity in August: 76%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is January (72%).
Average rainfall in August
Hilton Head Island, SC
- Average rainfall in August: 6.06"
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 August
Hilton Head Island, SC
- Average rainfall days in August: 25 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 August
Hilton Head Island, SC
- Average snowfall in August: 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 August
Hilton Head Island, SC
- Average snowfall days in August: 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 August
Hilton Head Island, SC
- Average sea temperature in August: 83.5°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 August /
Average sunshine in August
Hilton Head Island, SC
- Average daylight in August: 13h and 2min
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 August: 10h and 5min
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 August
Hilton Head Island, SC
- Average sunshine days in August: 2.8 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 August
Hilton Head Island, SC
- Average UV index in August: 7
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 August
Hilton Head Island, SC
- Average cloud cover in August: 27
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 August
Hilton Head Island, SC
- Average visibility in August: 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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