Myrtle Beach Weather Averages

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Myrtle Beach in South Carolina enjoys mild temperatures for most of the year. Summer is the rainiest time of year, while spring and fall are the driest. In any month though, most days at this destination city have no rain.

This page gives detailed information on the annual weather averages for Myrtle Beach. You can jump directly to data and descriptions for:

The temperature and rainfall numbers here are historical averages based on climate data gathered at Myrtle Beach. The sunshine and humidity measurements are averages from the Charleston International Airport located south along the coast in North Charleston, SC. This weather station has a climate similar to Myrtle Beach and is the closest one that collects sun and humidity information for the National Climatic Data Center.

temperature iconTemperature

73 °F annual average high 23 °C
52 °F annual average low 11 °C

Myrtle Beach's coldest days of the year usually occur in mid January when the daily maximum temperature averages 55 degrees Fahrenheit (13 degrees Celsius) and the minimum averages 34 °F (1 °C).

The year's hottest days are normally in mid July. The average temperature peaks then with daily highs of 88 °F (31 °C) and nighttime lows of 72 °F (22 °C).

222 days 70 °F maximum or above (21 °C)
41 days 32 °F minimum or below (0 °C)

Myrtle Beach averages 20 days a year when the thermometer reaches into the 90s °F (over 32 °C). But the temperature climbs to 100 °F (38 °C) or more only about once a decade. Every few years the thermometer remains below freezing for an entire day in January or December.

The temperature dips to 20 °F (-8 °C) or below on an average of 3 nights a year. But it's quite unusual for Myrtle Beach to get as cold as 10 °F (-12 °C).

precipitation iconPrecipitation

51.4 inches total yearly precipitation 1305 millimetres
93 days of rain or snowfall

July is usually the wettest month of the year in Myrtle Beach, while November is the driest.

sunshine iconSun

63 % sunshine annually
102 days with clear skies

The sun's rays reach the ground in Myrtle Beach during 63 percent of daylight hours on average year round, for a total of 2800 hours annually. Typically on 102 days a year the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight at the popular holiday spot averages 12 hours and 10 minutes a day. The shortest days of the year in mid December have 9 hours and 55 minutes of daylight. The year's longest days in mid June last 14:24 from sunrise to sunset.

humidity iconHumidity

73 % average humidity

The annual average for relative humidity in Myrtle Beach ranges throughout the day from 85 percent at 4:00 am to 55 percent at 1:00 pm standard time.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 84 85 85 66 55 56 71 81

lightning cloud iconStorms

4 % chance a named storm makes landfall

In any year, there's a 2 percent probability that a hurricane will reach land in Horry county, which includes Myrtle Beach. For major hurricanes of category 3 to 5, the likelihood drops to less than one percent. Named storms usually arrive during the months of June to November, while hurricanes are generally restricted to August, September and October.

The chances that a wind gust reaches 40 miles per hour (64 kilometres an hour) or greater is 24 percent a year. Intense hurricane force winds that top 115 mph (185 kph) have a 2 percent probability of blasting the county.

Reference

These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity statistics are 1961-1990 normals. The named storm and wind gust probability information comes from United States Landfalling Hurricane Probability Project of Colorado State University and Bridgewater State University.

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