Myrtle Beach Weather in July

July has the hottest and wettest weather for Myrtle Beach, South Carolina. In most years though, the temperature never rises above 100 degrees Fahrenheit (38 degrees Celsius). And most days this month have no rain.

This page gives detailed information on the typical July temperature, precipitation, sun, humidity and storms for Myrtle Beach. The temperature and rainfall numbers here are historical averages based on climate data gathered at Grand Strand Airport. The sunshine and humidity measurements are averages from Charleston International Airport.

Temperature Weather iconTemperature

88 °F July average high 31 °C
74 °F July average low 23 °C

July is the hottest month for this vacation destination, with the year's overall temperatures peaking from the 4th to 26th. These dates have daily highs averaging 88 °F (31 °C) and lows of 74 °F (23 °C).

8 days 90 °F max. or more (32 °C)
6 days 70 °F min. or less (21 °C)

Usually every day in July warms to over 80 °F (27 °C) in Myrtle Beach. Temperatures of 100 °F (38 °C) or above are not normal here.

In most years, July does not get as cold as 60 °F (16 °C).

Rainy Weather iconRain

5.4 in total precipitation 137 mm
13 days of rain

Half the time, Myrtle Beach receives 3.1 to 7.2 inches (79 to 182 mm) of rainfall in July. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

67 % sunshine
5 days clear skies

The sun's rays reach the ground in Myrtle Beach during 67 percent of daylight hours on average in July, for a total of 293 hours in the month. Typically on 5 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in July at the seaside city lasts for 14 hours and 7 minutes a day on average. The longest day of the month is the 1st with 14 hours and 21 minutes of daylight. By the end of the month, the days have shortened to 13:49 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

77 % July average humidity

The relative humidity in Myrtle Beach during July usually peaks at 89 percent in the morning then drops to 60 percent by early afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 88 89 86 68 60 63 74 84

Stormy Weather iconStorms

4 days rainfall of 0.5 inches (13 mm) or more
6 % chance a named storm approaches

There's a 6 percent probability that a named tropical storm will approach within 100 miles (165 km) of Myrtle Beach during July, and a 2 percent chance of a category 1 or 2 hurricane. Major hurricanes are unlikely this time of year.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

Myrtle Beach Weather
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