This report describes the typical weather at the Hilton Head Airport (Hilton Head Island, South Carolina, United States) weather station over the course of an average June. It is based on the historical records from 2005 to 2012. Earlier records are either unavailable or unreliable.
Hilton Head Island, South Carolina has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by oceans and seas (54%), forests (29%), croplands (8%), lakes and rivers (6%), and grasslands (3%).
The month of June is characterized by gradually rising daily high temperatures, with daily highs ranging from 84°F to 88°F over the course of the month, exceeding 94°F or dropping below 79°F only one day in ten.
Over the course of June, the length of the day is essentially constant. The shortest day of the month is June 1 with 14:07 hours of daylight; the longest day is June 18 with 14:15 hours of daylight.
The earliest sunrise is at 6:15am on June 12; the latest sunset is at 8:34pm on June 29; the latest sunrise is at 6:20am on June 30; the earliest sunset is at 8:25pm on June 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in June, so the entire month is in daylight time.
The median cloud cover is 22% (mostly clear) and does not vary substantially over the course of the month.
On June 15, a representative day, the sky is clear or mostly clear 49% of the time, partly cloudy 13% of the time, and mostly cloudy or overcast 16% of the time.
The average probability that some form of precipitation will be observed in a given day is 29%, with little variation over the course of the month.
Throughout June, the most common forms of precipitation are thunderstorms, moderate rain, and light rain.
Thunderstorms are the most severe precipitation observed during 56% of those days with precipitation. They are most likely around June 30, when it is observed during 18% of all days.
Moderate rain is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around June 1, when it is observed during 5% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around June 16, when it is observed during 5% of all days.
Either snow is exceptionally unlikely to fall at this location in June or this station does not reliably report precipitation types.
The relative humidity typically ranges from 58% (mildly humid) to 96% (very humid) over the course of a typical June, rarely dropping below 44% (comfortable) and reaching as high as 100% (very humid).
The air is driest around June 25, at which time the relative humidity drops below 65% (mildly humid) three days out of four; it is most humid around June 1, rising above 94% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical June, the dew point typically varies from 66°F (muggy) to 76°F (oppressive) and is rarely below 59°F (comfortable) or above 80°F (very oppressive).
Over the course of June typical wind speeds vary from 0 mph to 11 mph (calm to gentle breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around June 22, at which time the average daily maximum wind speed is 11 mph (gentle breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around June 9, at which time the average daily maximum wind speed is 11 mph (gentle breeze).