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 year. 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%).
Over the course of a year, the temperature typically varies from 37°F to 87°F and is rarely below 25°F or above 92°F.
The warm season lasts from May 25 to September 24 with an average daily high temperature above 81°F. The hottest day of the year is July 19, with an average high of 87°F and low of 75°F.
The cold season lasts from December 6 to February 29 with an average daily high temperature below 60°F. The coldest day of the year is January 19, with an average low of 37°F and high of 53°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:54 hours of daylight; the longest day is June 20 with 14:24 hours of daylight.
The earliest sunrise is at 6:03am on June 12 and the latest sunset is at 8:30pm on June 28. The latest sunrise is at 7:36am on November 3 and the earliest sunset is at 5:06pm on December 2.
Daylight saving time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 26% (mostly clear) to 44% (partly cloudy). The sky is cloudiest on January 8 and clearest on November 11. The clearer part of the year begins around March 6. The cloudier part of the year begins around December 10.
On November 11, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 46% of the time, and overcast or mostly cloudy 27% of the time.
On January 8, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 39% of the time, and clear or mostly clear 34% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around July 29, occurring in 43% of days. Precipitation is least likely around October 30, occurring in 23% of days.
Over the entire year, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 38% of those days with precipitation. It is most likely around January 11, when it is observed during 17% of all days.
Thunderstorms are the most severe precipitation observed during 31% of those days with precipitation. They are most likely around July 30, when it is observed during 27% of all days.
Moderate rain is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around January 8, when it is observed during 8% of all days.
During the warm season, which lasts from May 25 to September 24, there is a 38% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (54% of days with precipitation have at worst thunderstorms), light rain (25%), moderate rain (13%), and heavy rain (8%).
During the cold season, which lasts from December 6 to February 29, there is a 31% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (52% of days with precipitation have at worst light rain), moderate rain (26%), heavy rain (7%), and thunderstorms (6%).
The likelihood of snow falling is highest around February 1, occurring in 2% of days.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 48% (comfortable) to 97% (very humid) over the course of the year, 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 July 26, exceeding 95% (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 year, the dew point typically varies from 28°F (dry) to 77°F (oppressive) and is rarely below 9°F (dry) or above 80°F (very oppressive).
There are two periods in the year that are most comfortable: The first is between March 13 and May 14 and the second is between October 5 and December 1. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 0 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 April 6, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around October 30, at which time the average daily maximum wind speed is 11 mph (gentle breeze).