This report describes the typical weather at the Grand Strand Airport (North 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.
North 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 (26%), croplands (18%), and grasslands (13%).
The month of March is characterized by rising daily high temperatures, with daily highs increasing from 60°F to 67°F over the course of the month, exceeding 75°F or dropping below 50°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 12:32 hours of daylight.
The earliest sunrise is at 6:31am on March 10; the latest sunset is at 7:36pm on March 31; the latest sunrise is at 7:30am on March 11; the earliest sunset is at 6:12pm on March 1.
Daylight saving time (DST) starts at 3:00am on March 11, 2012, shifting sunrise and sunset to an hour later.
The median cloud cover ranges from 29% (mostly clear) to 37% (mostly clear). The trend is for the sky to be clearing with the median cloud cover decreasing by 8% from the start to the end of the month.
On March 16, a representative day, the sky is clear or mostly clear 36% of the time, partly cloudy 7% of the time, and mostly cloudy or overcast 30% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around March 1, occurring in 30% of days. Precipitation is least likely around March 30, occurring in 26% of days.
Throughout March, the most common forms of precipitation are light rain, moderate rain, and thunderstorms.
Light rain is the most severe precipitation observed during 46% of those days with precipitation. It is most likely around March 1, when it is observed during 14% of all days.
Moderate rain is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around March 1, when it is observed during 8% of all days.
Thunderstorms are the most severe precipitation observed during 15% of those days with precipitation. They are most likely around March 31, 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 48% (comfortable) to 95% (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 5, at which time the relative humidity drops below 62% (mildly humid) three days out of four; it is most humid around March 22, rising above 92% (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 March, the dew point typically varies from 34°F (dry) to 54°F (very comfortable) and is rarely below 18°F (dry) or above 64°F (mildy humid).
Over the course of March typical wind speeds vary from 1 mph to 14 mph (calm to moderate breeze), rarely exceeding 19 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 14 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around March 1, at which time the average daily maximum wind speed is 13 mph (moderate breeze).