This report describes the typical weather at the Myrtle Beach International Airport (Myrtle Beach, South Carolina, United States) weather station over the course of an average May. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Myrtle Beach, 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 (42%), forests (31%), croplands (18%), and grasslands (7%).
The month of May is characterized by rising daily high temperatures, with daily highs increasing from 76°F to 82°F over the course of the month, exceeding 89°F or dropping below 69°F only one day in ten.
Over the course of May, the length of the day is gradually increasing. The shortest day of the month is May 1 with 13:33 hours of daylight; the longest day is May 31 with 14:14 hours of daylight.
The earliest sunrise is at 6:07am on May 31; the latest sunset is at 8:21pm on May 31; the latest sunrise is at 6:26am on May 1; the earliest sunset is at 7:59pm on May 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in May, so the entire month is in daylight time.
The median cloud cover ranges from 46% (partly cloudy) to 54% (partly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 8% from the start to the end of the month.
On May 16, a representative day, the sky is clear or mostly clear 35% of the time, partly cloudy 21% of the time, and mostly cloudy or overcast 37% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around May 31, occurring in 34% of days. Precipitation is least likely around May 1, occurring in 28% of days.
Throughout May, the most common forms of precipitation are thunderstorms and light rain.
Thunderstorms are the most severe precipitation observed during 54% of those days with precipitation. They are most likely around May 31, when it is observed during 20% of all days.
Light rain is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around May 31, when it is observed during 11% of all days.
Either snow is exceptionally unlikely to fall at this location in May or this station does not reliably report precipitation types.
The relative humidity typically ranges from 50% (mildly humid) to 91% (very humid) over the course of a typical May, rarely dropping below 30% (comfortable) and reaching as high as 100% (very humid).
The air is driest around May 1, at which time the relative humidity drops below 62% (mildly humid) three days out of four; it is most humid around May 30, rising above 87% (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 May, the dew point typically varies from 50°F (very comfortable) to 69°F (muggy) and is rarely below 37°F (dry) or above 75°F (very muggy).
Over the course of May typical wind speeds vary from 0 mph to 15 mph (calm to moderate breeze), rarely exceeding 20 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around May 1, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around May 31, at which time the average daily maximum wind speed is 14 mph (moderate breeze).