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 March. 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 March is characterized by rising daily high temperatures, with daily highs increasing from 62°F to 68°F over the course of the month, exceeding 77°F or dropping below 51°F only one day in ten.
Over the course of March, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 1:03 hours, implying an average day-over-day increase of 2.0 minutes.
The shortest day of the month is March 1 with 11:29 hours of daylight; the longest day is March 31 with 12:31 hours of daylight.
The earliest sunrise is at 6:32am on March 10; the latest sunset is at 7:36pm on March 31; the latest sunrise is at 7:31am on March 11; the earliest sunset is at 6:12pm on March 1.
Daylight savings time (DST) starts at 3:00am on March 11, 2012, shifting sunrise and sunset to an hour later.
The median cloud cover ranges from 47% (partly cloudy) to 56% (partly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 9% from the start to the end of the month.
On March 16, a representative day, the sky is clear or mostly clear 37% of the time, partly cloudy 15% of the time, and mostly cloudy or overcast 40% of the time.
The average probability that some form of precipitation will be observed in a given day is 26%, with little variation over the course of the month.
Throughout March, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 52% of those days with precipitation. It is most likely around March 2, when it is observed during 15% of all days.
Thunderstorms are the most severe precipitation observed during 24% of those days with precipitation. They are most likely around March 31, when it is observed during 8% of all days.
Moderate rain is the most severe precipitation observed during 16% of those days with precipitation. It is most likely around March 1, when it is observed during 5% of all days.
Either snow is exceptionally unlikely to fall at this location in March or this station does not reliably report precipitation types.
The relative humidity typically ranges from 46% (comfortable) to 88% (very humid) over the course of a typical March, rarely dropping below 25% (dry) and reaching as high as 100% (very humid).
The air is driest around March 31, at which time the relative humidity drops below 59% (mildly humid) three days out of four; it is most humid around March 11, rising above 83% (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 March, the dew point typically varies from 33°F (dry) to 54°F (very comfortable) and is rarely below 18°F (dry) or above 64°F (mildy humid).
The time of the month between March 10 and March 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of March typical wind speeds vary from 0 mph to 16 mph (calm to moderate breeze), rarely exceeding 21 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around March 30, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around March 1, at which time the average daily maximum wind speed is 15 mph (moderate breeze).